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  • 1.
    Abdi, Mohamed Amin Omar
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Mohamed, Abdirahman Abdulahi
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Riskanalys av kretskort i ställverk 85 med hjälp av FMEA2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Interlocking system 85, which is used by the Swedish Transport Administration today, is a signal distribution system and is coming to the end of its useful life, which has resulted in a lack of spare parts. The goal of this work is to identify the most critical components in the central unit and distribution system in interlocking system 85 and to investigate why these components fail.

    To achieve this goal, methods such as literature study, collection of documentation from the Swedish Transport Administration, workshop at interlocking system 85 supplier Alstom and FMEA are used to model results.

    Results from the work show that lightning is a major reason why the circuit boards in switchgear 85 fail for both circuit boards that have been studied during the work, MDM, and TRE boards. In addition to the lightning, the work shows that the transistors in the TRE-board are a component that fails to a great degree. For the MDM-board there is not a specific component that fails more than the other.

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  • 2.
    Abdulahad, Siba
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Hanna, Oditte
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Innovativ doseringsask2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis focuses on designing and developing a medication dispenser that can facilitate the medication dosing process for users, especially people suffering from chronic diseases. The goal is to create a simple and user-friendly product that helps users keep track of the correct dosage and timing of medication.

    The thesis aims to design and develop an innovative dosing product that is tailored to the needs of users while addressing the problem of people often forgetting to take their medications. The product must be user-friendly, manageable, and portable. The goal is to create a well-thought-out final concept that satisfies the needs and wishes of all users.

    To achieve this, a method was applied that includes a preliminary study phase where both primary and secondary data are collected to acquire relevant knowledge within the subject. Interviews were conducted with people suffering from chronic diseases to obtain specific information about the target group and to identify requirements and desirable characteristics. Idea generation was performed through the use of different methods to generate a diversity of concepts and solutions.

    With the help of prototype tests and continuous evaluations, the product was gradually improved.

    An important feature of the new product is its ability to organize the medicines by having two compartments for each day. This makes it easier for users to keep track of which medicines to take at different times during the day. Studies were also conducted to determine the optimal volume of each box so that it could accommodate 12 medium-sized tablets and meet the product size requirement. The material selection and dimensioning of the box were done carefully to ensure easy cleaning and portability.

    The quality and function of the product were thoroughly tested to ensure that they met the needs of users. A wireless connection to a mobile application was implemented for remote medication monitoring and tracking. The Bluetooth module, buttons, and screen were carefully selected to fit the dimensions of the box.

    The end product is a dosing box that is ergonomically designed. Its features, such as organized compartments for each day and wireless connection to the mobile application, give users the opportunity for structured and controlled medication.

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  • 3.
    Abdullah Asif, Farazee Mohammad
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Manufacturing and Metrology Systems.
    Salehi, Niloufar
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Manufacturing and Metrology Systems.
    Lieder, Michael
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Manufacturing and Metrology Systems.
    Consumer perceptions of circular business model: a case of leasing strollers2022In: Manufacturing Driving Circular Economy: Proceedings of the 18th Global Conference on Sustainable Manufacturing, October 5-7, 2022, Berlin / [ed] Holger Kohl, Günther Seliger, Franz Dietrich, Springer Nature , 2022, p. 953-960Conference paper (Refereed)
    Abstract [en]

    Circular Economy (CE) promotes trading functions of a product as aservice instead of selling the product in conventional ways. For a product like ababy stroller, the function means ensuring mobility with infants without needingto own a stroller. This approach of acquiring functions only when needed opensup the possibility to share the same products with multiple users. For a manufacturer that has built its business on a conventional sales model over the decades,this shift may be too radical. Therefore, for the manufacturers, it is important tounderstand consumer perceptions of the service-oriented business model beforeentering this unknown territory. To develop a thorough understanding of consumerperceptions of leasing a stroller instead of buying one, a survey among 200 parentsin Stockholm is conducted. The survey brings out quantitative results such as 39%of respondents are open to leasing and identifies key influencing factors such asconvenience and environmental image that play a key role for the remaining 61%of respondents to choose leasing. This research concludes that a large numberof consumers are open to leasing if a high level of service and environmentallysustainable strollers are offered at a competitive price.

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  • 4.
    Aboul Hosn, Alan
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Resource efficient manufacturing within the steel industry: A study of the approaches utilized by steel manufacturers to optimize resource efficiency2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The steel industry plays a critical role in shaping the modern world, serving as a foundational pillar for infrastructure, construction, and manufacturing sectors. However, its rapid growth has sparked concerns regarding its environmental impact and sustainability. As the industry aims for net-zero carbon dioxide production by 2050, this report explores the challenges it faces in adopting environmentally responsible practices and presents innovative approaches to reduce its ecological footprint.

    Before delving into emerging technological innovations, a comprehensive overview of the current state of the steel industry was conducted to understand production levels and the methods employed by various nations. The analysis reveals five major innovative developments aimed at addressing anthropogenic carbon dioxide emissions: oxygen and top gas recycling blast furnaces, biomass utilization, molten oxide electrolysis, hydrogen-based steelmaking, and carbon capture, storage, and utilization. Each approach's technological readiness level varies, with some already implemented while others, like molten oxide electrolysis, requiring further research and development. In-depth evaluations of each approach were conducted, considering both environmental and economic aspects to ascertain their feasibility and potential benefits in comparison to one another. This assessment provides an overarching perspective on the viability of each approach.

    With the steel industry's trajectory towards carbon neutrality, these innovative technologies hold the key to a more sustainable future for the industry. By embracing environmentally responsible practices and actively implementing these emerging solutions, the steel sector can contribute significantly to global efforts in combatting climate change and fostering a greener world.

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  • 5.
    Aho, George
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Simulering och optimering av produktionslinje2024Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The goal of this project was to optimize the production line to maximize the number of completed items produced. The project started with a planning and research of the tools which will be used such as simulation, lean principles, and information related to the production line. Thereafter, it was modelled in the simulation tool based on the data collection that was carried out and the simulation method. Once the model was ready, experimental tests were conducted to investigate how specific factors, such as strategically placed buffers and the number of operators, affected the efficiency of the production line's processing. Based on the results of these tests, an optimal level for the factors to be used in the full factorial design tests was determined. With these tests performed, it was noted that no optimization could be carried out on the production line as the simulation achieved only 72% efficiency when the target for the production line is 75%. Instead, other strategic recommendations were provided on what the company could do to increase the efficiency of the production line. These recommendations include, a temporary buffer, waiting out temporary stoppages, addressing deviant process steps, and reducing rejections.

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  • 6.
    Akgül, Hazal-Dilan
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Konceptframtagning av vedklyv för inomhusbruk2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    We live in a time where access to energy is an issue that affects a large part of the world's population. The demand for renewable fuels is increasing, and solid fuels such as wood are becoming an increasingly attractive alternative for heating households. To produce wood for this purpose, the most serviceable log splitters today are large and suitable for outdoor environments. However, the reasonably compact alternatives that could be used in indoor environments are manual constructions that require precision and hand strength. These factors make them less user-friendly to the larger mass, and the product is less suited to users who, for various reasons, cannot use muscle power to split the wood.

    The objective of this thesis was to develop a concept proposal for a wood splitter for indoor use that aims to improve the possibilities for splitting wood indoors.

    The project commenced with market analysis, and literature studies have been used as methods in order to determine the most essential requirements. The literature study provided information on the necessary splitting force depending on the wood species and dimensions.

    The project result is a concept that enables firewood splitting with up to five tonnes of splitting force. The concept consists entirely of an electric scissor jack, a stand with an associated base plate, and a wedge splitter. Furthermore, the design of the stand enables the height of the splitting wedge to be adjusted. Dimensioning of the construction's parts is partly based on shipping costs at USPS and partly on the proper mechanism to function as desired. The log splitter is visualized as a CAD model where the choice of material and color is based on the concept definition and concept generation phase.

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  • 7.
    Alqayem, Wisam
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Bahnam, Rita
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Digitala och analoga tavlor i pulsmöten: En jämförelse av fördelar och nackdelar2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Digitalization plays an increasingly prominent role in our daily lives, and one sector strongly impacted by this development is the manufacturing industry. Within manufacturing companies, there is a constant effort to improve processes and reduce unnecessary waste. An important method in this area is lean, which focuses on continuous improvement with the goal of eliminating waste and inefficiency. In lean, it is crucial to make information visible and accessible at the right time, in the right place, and to the right people throughout the organization. One method to visualize and make this information visible is the use of pulse boards. With the emergence of Industry 4.0 and the ongoing digitalization, digital boards become a relevant solution for making information visible.

    The purpose of this study is to examine the advantages and disadvantages of analog and digital pulse boards in the pharmaceutical and automotive industries. By analyzing and comparing these two tools, a deeper understanding of factors and opportunities related to the optimization of these tools in both industries is achieved. To achieve this purpose, the authors have gathered information from the literature and conducted interviews with individuals from the respective industries.

    Both the advantages and disadvantages of digital and analog pulse boards emerge through literature studies and interviews. Some advantages of digital boards are that the information is automatically updated from various systems and presented in a simple manner. The disadvantages of digital boards include that employees do not feel the same connection to the information as they do with analog boards, and that engagement decreases when participating in remote meetings.

    In conclusion, both digital and analog boards have their advantages and disadvantages. However, it should be noted that in this work, the advantages are weighted more heavily, and there are more advantages to digital boards than disadvantages according to both the literature and practical experience within these industries.

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  • 8.
    Amir, Saman
    et al.
    Department of Marketing & Strategy and Center for Sustainability Research, SSE Stockholm School of Economics, Stockholm, Sweden.
    Salehi, Niloufar
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Manufacturing and Metrology Systems.
    Roci, Malvina
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Sweet, Susanne
    Department of Marketing & Strategy and Center for Sustainability Research, SSE Stockholm School of Economics, Stockholm, Sweden.
    Rashid, Amir
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Toward a Circular Economy: A Guiding Framework for Circular Supply Chain Implementation2024In: Springer Series in Supply Chain Management, Springer Nature , 2024, Vol. 23, p. 379-404Chapter in book (Refereed)
    Abstract [en]

    This chapter presents a guiding framework for circular economy implementation in supply chains. Closing the loop for resource efficiency is a well-known practice in the industry. To concretize the circular economy implementation strategies, closed-loop thinking requires innovation and adaptation. Circular supply chains (CSCs) are one of the key enablers in closing the loop by design or intention for value recovery and profit maximization. CSC is an emerging area, and the view of CSC where forward and reverse supply chain is seamlessly integrated with the overall aim to achieve system-wide circularity is missing in the academic debate. By offering a cross-functional and systemic perspective of circular supply chains, we present a guiding framework to structure and understand the underlying complexities and highlight the crucial elements of circular supply chain implementation. The framework categorizes the circular supply chain into four building blocks: systemic approach, main drivers, levels of decision making, and mechanisms to manage the full loop closure and minimize the inherent uncertainties of a complex system. We conclude the chapter by illustrating the applicability of the circular supply chain framework using two industrial cases that are transitioning toward the circular economy.

  • 9.
    Amnelius, Gustaf
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Flink, Gustav
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Framtagning av optimal buffertstorlek för ökad produktion på Scania2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This project has been done for Scania, which is one of the leading companies in truck manufacturing. The work has been carried out on site in Södertälje at Scania’s cylinder head manufacturing. The production line the project has been carried out on is relatively new and has had a few problems during its start up.

    One of these problems is a buffer located between the machines OP70 and OP80 that, most of the time, is either full or empty. This leads to loss of production. That is why Scania wants to investigate whether a change in buffer size can solve this problem.

    To help with investigating whether a larger buffer would solve the problem simulation was used. In the simulation program ExtendSim 10 two simulation models were built. One model was named “nuläge” and is a reflection of how the production line looked at the start of the project. The other was named “målbild” and uses the cycle times and shut down frequencies Scania wishes to have in the future. During the course of the project Scania started using new tools in the OP80 machines and it was decided to use these new tools in the målbild simulation but not in the nuläge simulation.

    When all relevant buffer sizes had been simulated, graphs showing how many manufactured pieces you would get at different buffer sizes could be plotted. Graphs showing the percentage of which production was increased, compared to the existing buffer with 7 places, was also created in a similar way. Through these graphs the optimal buffer size for both simulations could be established.

    From these results three courses of action were discussed and compared by their pros and cons. Lastly a recommended course of action is chosen.

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  • 10.
    Antonelli, Dario
    et al.
    Department of Management and Production Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10138 Torino, Italy, Corso Duca degli Abruzzi 24..
    Aliev, Khushid
    Department of Management and Production Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10138 Torino, Italy, Corso Duca degli Abruzzi 24..
    Soriano, Marco
    Department of Management and Production Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10138 Torino, Italy, Corso Duca degli Abruzzi 24..
    Samir, Kousay
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Monetti, Fabio Marco
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Maffei, Antonio
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Industrial Production Systems.
    Exploring the limitations and potential of digital twins for mobile manipulators in industry2024In: 5th International Conference on Industry 4.0 and Smart Manufacturing (ISM 2023), Elsevier BV , 2024, Vol. 232, p. 1121-1130Conference paper (Refereed)
    Abstract [en]

    This paper explores the qualification of a digital twin (DT) for a mobile manipulator (MOMA) in industrial applications. We discuss the development of different DT models based on various industrial needs and highlight the dependence of model accuracy on online sensor precision. Limitations of DTs for MOMA are examined, including challenges in respecting qualifiers due to the inability to incorporate unstructured aspects of the factory environment. Through a case study and some examples, we show the latent potential and limitations of DTs for MOMA in industrial contexts. The challenges of fidelity, real-time operation, and environment modeling are discussed. It is emphasized that creating a true digital twin of a mobile manipulator is hindered by the inability to include the complete surrounding environment. Recommendations for future research focus on addressing these limitations to enhance the effectiveness of DTs for MOMA in Industry 4.0 and smart manufacturing.

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  • 11.
    Arekrans, Johan
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Nilsson, Susanne
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Ritzén, Sofia
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Management Controls in a Circular Economy Transition2023In: 30 Years of Research in Innovation and Product Development Management: Discovering together the next 30, 2023Conference paper (Refereed)
    Abstract [en]

    Management control systems offers powerful ways of guiding employee behavior and implementing organizational strategy. Given the new business logic and the extensive and complex challenges that industrial firms face in light of a circular economy transition, this paper is oriented around two questions. First, the compatibility between traditional management control systems and circular economy. Second, how management control systems can support the radical transformation of firms that circular economy entails. By scrutinizing extant research on MCS, six propositions are developed and grounded in empirical illustrations. These propositions hold relevant implications for practitioners, and several promising avenues for future research are highlighted.

  • 12.
    Aristeidou, Antonis
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Development of a Business Model Framework for Collaborative Model-Based Engineering2024Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The shift towards Smart Manufacturing Systems has led to the digital transformation era, leveraging various technologies to drive enhanced productivity and production efficiency. In addition, the digitalization of the manufacturing industry makes extensive use of industrial information systems to support technical and business operations throughout a product’s lifecycle. However, evidence highlights the financial and environmental costs incurred by creating and maintaining digital models, which threaten an organization’s sustainability. Therefore, in this thesis, it is believed that alternative revenue sources emerging from monetizing repurposed knowledge embedded into digital models will serve as enablers to sustainability while promoting industrial innovation through collaborative ecosystems of partners where the focus is on the mutual exchange of value.

    This thesis emphasizes the process planning task entirely, and it aims to investigate two main areas, the former involving a bibliographic analysis of business models associated with the servitization of the manufacturing industry within value co-creation environments, along with their corresponding technical enablers and requirements, while the latter focusing on identifying the stages in which company knowledge and expertise is embedded into digital models. A series of case studies in collaboration with a major Swedish manufacturing company revealed process planning experts’ workflows, challenges, and opportunities to improve the company’s current services.

    The analysis and comparison of the two use cases indicated two discrete types of process planning workflows that are assumed to apply in different production systems. Furthermore, an attempt has been made to correlate process planning to business modeling by suggesting several conceptual digital products and services that can enhance the company’s existing offerings’ functionality. The corresponding value propositions of the proposed digital offerings have been formulated.

    The proposed conceptual digital offerings have been validated together with the involved organization. At this stage, further improvements and validation are needed to justify the feasibility of the proposed business model framework and digital offerings. However, further developments and compliance of industrial information system providers with information standards can potentially enable business innovation through collaboration in the manufacturing industry.

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  • 13.
    Aronsson, Olle
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Trad, Tanios Toufic
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Utveckling av en behållare för matleveranser med drönare2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Technical advancements in fields like battery technology, software engineering and remote-control technology has made commercial unmanned aerial vehicles (UAVs) or “drones” cheaper while also allowing for longer flight times, higher payload capacities and longer effective ranges. This combined with the growing market trend of home delivery services within the restaurant and food industries paves the way for studies on how this relatively new means of transportation can be used to deliver food to customers within range. This paper will focus on developing and designing a third party mountable container from a mechanical engineering perspective that will allow commercially available quadcopter drones to deliver food items from one point to another. This means that the design process will be dictated by a set of identified core needs that the container is meant to satisfy while results from relevant calculations such as load simulations are taken into account. Further information and discussion like proposed manufacturing methods, sustainability and the prospects of further studies will also be brought up as it pertains to the containers design process.

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  • 14.
    Arora, Harnesh
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Framework for Supply Chain Resilience in the Construction department at Northvolt AB2023Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The interconnectedness of global supply chains, combined with disruptive events like the Covid-19 pandemic, has emphasized the significance of enhancing supply chain resilience (SCRes). Thus, this study aims to investigate how businesses employ SCRes recovery strategies to address extreme supply chain disruptions (SCD). To contribute empirical evidence on reactive SCRes strategies, qualitative methodology was employed, with a specific emphasis on the construction department at Northvolt. The construction industry serves as an apt context for assessing and offers valuable insights. Unstructured and semi-structured interviews were conducted with supply chain executives within the company to collect the data. The findings reveal specific challenges faced by the construction department at Northvolt in the face of global supply chain disruptions, shedding light on their responsive strategies. This study not only emphasizes the necessity of cultivating all SCRes capabilities but also contributes valuable empirical evidence to the field. The implications of these findings extend beyond Northvolt, providing actionable insights for businesses in the construction industry and offering recommendations for enhancing overall supply chain resilience.

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  • 15.
    Arvidsson, Alexander
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    CFD-analys med OpenFOAM som konstruktionsverktyg för utvärdering av tidiga iterationer av gasväxlingskomponenter2024Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis investigates the possibility of applying early and not so computational heavy simulations using Computational Fluid Dynamics (CFD) for optimization of gas exchange components early in the product development process.

    The scope of the thesis includes the development of generally applicable settings and guidelines – documented in a methodology – when modelling gas exchange components with the software OpenFOAM, optimized to use as low computational power as possible but still obtaining sufficiently accurate and reliable data.

    The report consists of a theoretical study and motives for simulation-related choices in OpenFOAM in order to adjust and validate the settings and parameter choices applied in the existing Excel script – developed by the department responsible for exhaust aftertreatment systems – that automates the set-up of OpenFOAM's simulation-related file structure. This in order to obtain and ensure reliable results using the script adapted to the environment for gas exchange components.

    The report also presents underlying analyses for different settings and choices in order to serve as well-founded guidelines throughout the CFD-process; such as the creation of geometric models, the generation of mesh, measures to ensure convergence, and the set-up and interpretation of the results.

    One of the deliverables of the thesis is a method description designed with practical guidelines for the entire CFD-process with intended software’s and with associated best practices in regards of simulation-related choices throughout the process.

    A number of case studies – that has been simulated in this thesis – show that OpenFOAM has the potential to perform initial and indicative simulations enabling a more time-efficiently and broader ideation in the concept development phase.

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  • 16.
    Arvidzon, Axel
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Incesu, Ali
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Ombeläggning av brynverktyg: En förstudie med industritillämpning2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this report, an industrial company in Sweden explored the possibility of in-house refurbishment of their honing tools used in a honing process, instead of relying on outsourced suppliers. The honing tool is a critical component in the production of cylinder liners, the company aims to have control over the availability, quality and to lower the cost of the honing tool refurbishment and reduce dependence on external companies.

    This project is thought to be a pre study which the industry company can use in the future as a base for developing the process needed to refurbish the honing tool themselves. In the prestudy two different solutions are proposed and presented with suggestions on layouts, flowcharts and tools needed. With this information the industry company has a good base to further develop this project and make a decision on if it is a feasible investment or not.

    The methods used in this project have foremost been empirical data gathering consisting of interviews and experiments. A literature study has also been carried out to base the recommendation for the technologies used on the two proposed solutions.

    The conclusion of the project is that regardless of which of the two solutions the industrial company would choose to peruse. Both solutions proposed will perform better in quality lead time and cost less over a 5-year period. If the industrial company wants to continue this project it is crucial that they gather representative data as in this project assumptions have been made where there was not sufficient data to base a decision on.

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  • 17.
    Ashok Kumar, Vasanth Kumaran
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Liang, Peng
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Modeling of Energy Consumptionin Milling Process to Assess their Environmental Impact2023Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis presents a method for modeling energy consumption in the milling process to assess their environmental impact, using a simple experimental approach. The factors influencing the environmental impact in milling processes are analyzed with life cycle assessment principles, and their climate change impact is calculated with examples of dry milling experiments. The model for predicting energy consumption is inspired by the mechanistic model of milling operation. The tangential cutting force coefficients are approximated using experimental data to estimate the spindle power. The developed model can predict energy consumption for given cutting parameters and conditions.

    The results of the study indicate that 1) the energy consumption of the milling process estimated by the proposed mechanistic-based model aligns well with the experimentally measured results, 2) the experimental approach used to build the model is both easy and fast, and 3) the consumption of the solid cutting tool contributes the most to the environmental impact in dry milling processes.

    Furthermore, the analysis presented in this thesis provides insight into how to improve energy efficiency and reduce the environmental impact of milling processes.

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  • 18.
    Athley, Axel
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Johnsson Kronovall, Victor
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Konstruktion av extruderingsmaskin för eget bruk2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In today's society additive manufacturing is getting more and more common. The technique is developing and is within reach for almost everyone. It is within the private sector the biggest growth of popularity can be seen. The increased usage of this technology has led to increased usage of plastic within this field. This means that the waste has increased as well. One of the most common materials for 3D-printing is PLA, this is because of a few different benefits. Although it has its cons, one of the bigger drawbacks is that it is hard to recycle. There are very few recycling facilities that can take care of PLA. This means that it is necessary to find another way to handle the otherwise wasted PLA. One way to do this is by making it possible for people to do it themselves, therefore the goal of this project, to develop an extruder for individuals. The extruder is supposed to use old PLA-prints to make new filament. This is good from an ecological perspective as well as an economic one. The extruder is designed to make it possible for the user to assemble it on their own. The project started with a background search, this was to get a better picture of the problem, but also to see what alternative solutions already exists. After this the phase of brainstorming as many ideas as possible started. When a concept had been chosen it was developed even further and calculations were done to ensure that it would work as intended. The calculations contained aspects such as strength of the base and pipe, but also the amount of energy needed from the motor and heaters to fulfill their respective functions. A complete design proposal for the extruder has been established, this together with supporting calculations and measurements for the different components. A few changes can be done to modify the machine for individual needs, however the calculations might have to be adapted depending on the changes that are made. A few of the dimensions on certain components might seem exaggerated. This is because they need to be able to handle the highest pressures and forces that may occur. These pressures and forces are only reached when the machine gets clogged up. The machine clogging should be unusual, but once it happens it might break without proper dimensions. At last smaller adjustments might have to be made by the user. This is because the machine has not been built, it is just a concept. Also, there will be differences depending on what specific component is chosen and the individual assembling process.

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  • 19.
    Azzo, Tara
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Dawod, Reim
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Effektivitets- och tidsanalyser av Scanias chassimontering2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Scania's chassis assembly utilizes the software AVIX to create bill of materials, position standards, and balance assembly lines. Currently, time measurement is done manually using stopwatch, but a transition to Scania Time Block (STB) is underway. STB is a method that already has standardized times for different tasks and replaces manual timing. The goal is to understand Scania's utilization of AVIX and ES, analyze the competencies in AVIX and STB, time more positions using STB, and improve processes and routines.

    STB is based on the MTM-SAM method and employs standardized codes for various tasks on the assembly line. An investigation was conducted on the pre-assembly of pressurized tanks to examine the time differences between the methods and the time pressure experienced by the assemblers. By utilizing STB, an objective and standardized time estimation for producing a specific variant could be obtained.

    An interesting observation was a clear deviation between the manually timed durations and the STB times. The manual timings seemed to overlook specific steps that operators must perform. Based on the analysis, it is recommended that Scania implement STB across all production facilities, particularly for chassis, to ensure fair cycle times that consider the actual time required for each task. This would contribute to improved processes and routines in the production line.

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  • 20.
    Baalsrud Hauge, Jannicke
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Advanced Maintenance and Production Logistics. Bremer Institut für Produktion und Logistik (BIBA) an der Universität Bremen, Bremen, Germany.
    Clua, E.
    Jaldemark, J.
    Söbke, H.
    Educational Location-based Interaction2022In: IxD&A: Interaction Design and Architecture(s), ISSN 1826-9745, E-ISSN 2283-2998, no 52, p. 141-143Article in journal (Refereed)
    Abstract [en]

    Mobile devices have become more common in recent years. A key feature is their location awareness. The absolute location as well as the relative location awareness related to an object can be exploited for location-based applications on mobile devices allowing location-based interactions. A common example are digital scavenger hunt apps that guide users to different locations. Social inclusion [1] and social interaction [2] are a common goal of location-based experiences. Location-based apps are also used for learning purposes, as they support a variety of learning concepts. In their literature review on mobile apps in general [3], the authors found situated learning, inquiry-based learning, sociocultural theory, scaffolding, communities of practice, and seamless learning, which can be taken as an indication of the manifold didactic options of location-based apps. 

  • 21.
    Baalsrud Hauge, Jannicke
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Advanced Maintenance and Production Logistics. BIBA Bremer Institut für Produktion und Logistik, BIBA Bremer Institut für Produktion und Logistik.
    Jeong, Yongkuk
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Advanced Maintenance and Production Logistics.
    Does the Improvement in AI Tools Necessitate a Different Approach to Engineering Education?2024In: Moving Integrated Product Development to Service Clouds in the Global Economy - Proceedings of the 21st ISPE Inc. International Conference on Concurrent Engineering, CE 2014, IOS Press , 2024, p. 709-718Conference paper (Refereed)
    Abstract [en]

    The integration of artificial intelligence (AI) into the manufacturing sector introduces new challenges and demands for the engineering workforce in the evolving European economy. This paper investigates how advancements in AI tools, especially in manufacturing, necessitate a shift in engineering education to equip graduates with relevant skills and ethical understanding. While AI is not new to manufacturing, its ongoing development and increased accessibility bring forth fresh challenges related to required competencies and ethical considerations. Furthermore, this work explores the potential of incorporating recent AI tools, such as ChatGPT and other generative adversarial networks, into engineering education. This is illustrated through a case study of a master’s level digitalization course. In this course, AI tools aimed to help students bridge their programming knowledge gaps and educate them on ethical AI use, providing a model adaptable to lifelong learning courses in the field. This inquiry also addresses the broader concerns related to AI misuse in academic settings and the subsequent difficulties in plagiarism detection and accurate learning outcome assessment. The discussion does not argue against AI adoption but emphasizes managing its inadvertent impacts on the industry and society. By integrating emerging technologies and their ethical use into the curriculum, the engineering education system can better align with the shifting demands of the workforce in an increasingly digitalized manufacturing landscape.

  • 22.
    Baalsrud Hauge, Jannicke
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Advanced Maintenance and Production Logistics. Bremer Institut für Produktion und Logistik GmbH an der Universität Bremen, Bremen, Germany.
    Kalverkamp, Matthias
    Wiesbaden Business School, RheinMain University of Applied Sciences, 65183, Wiesbaden, Germany.
    Report on Integrating a COTS Game in Teaching Production and Logistics2023In: Advances in Production Management Systems. Production Management Systems for Responsible Manufacturing, Service, and Logistics Futures - IFIP WG 5.7 International Conference, APMS 2023, Proceedings, Springer Nature , 2023, p. 433-445Conference paper (Refereed)
    Abstract [en]

    The experiential learning principle has a long tradition in engineering education. Within production & supply chain management as well as logistics, a primarily learning goal is connected to the complexity of decision making and how the same decision may impact differently depending on the context. Such decisions are complex and difficult to understand, and serious games have proven to contribute to this understanding. Many of the games used for teaching the relevant topics are typically applied in a workshop setting and are often been specifically made for a specific course. However, not all educational institutions have the possibility to develop tailored games since the development requires multi-disciplinary knowledge, are costly and time consuming. The usage of commercial off-the-shelf games might be a solution. We know from existing work that this requires that the game can be modded or adapted to fit the intended learning outcomes in the course it may be used. This article takes previous work on the integration of commercial off-the-shelf games into logistics, engineering and supply management education one step further, and reports on the first results of full implementation.

  • 23.
    Baggström Gulde, Andreas
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Simensen, Erik
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    AI:s påverkan på förebyggande underhåll: En analys av resultat, begränsningar och risker i industriproduktion2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With greater demands for resource-efficient production to reach climate targets, more modern industry and continuous pursuit of profitability, AI can be used to streamline maintenance. This report aims to provide the reader with a greater understanding of artificial intelligence in preventive maintenance, its challenges, and potential applications. As a method, several case studies and two interviews were compiled to provide a detailed picture of maintenance methods and areas of application. Furthermore, to gain an insight into how well-established companies handle problems related to maintenance. The report also deals with economic aspects, practical differences, limitations, and reliability of the systems.

    Using AI in maintenance places challenges on the company, not least on data storage and data quality. The relationship between AI and maintenance is just beginning and is expected to have great maturity and positive development going forward. The report shows that the integration of AI in maintenance potentially contributes to greater uptime, more efficient fault identification and a safer environment.

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  • 24.
    Bajalan, Ismail
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Nors, Petter
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Modellering och Simulering av Värmehanteringssystem för Batteridrivna Elektriska Fordon (BEV)2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this thesis, a thermal management system is simulated in Matlab Simulink for an battery electric truck, in order to thermally manage the vehicle's climate. A heat pump is implemented to cool down the cabin and battery while a PTC (electric heater) is implemented to heat the systems respectively. The heat pump works by the compressor vaporizing the R-134a refrigerant in the system, which is then converted to liquid when cooled by the condenser, which exchanges energy with the surrounding air. The liquid is sent further to a receiver that filters the refrigerant and is then transferred to an expansion valve that controls the pressure in the system. The liquid then goes to the evaporator to be cooled by an exchange with warmer ambient air from the vehicle cabin, after which the cooling process begins again. The PTC heater has a passive heating functionality that receives current through a resistor and heats the component using a coolant loop.

    The battery's range is reduced at incorrect temperatures, therefore the battery's temperature can be checked during operation. This is to theoretically increase the range of the vehicle by having the battery at a more favorable temperature. A pre-study is carried out where data is collected to then model, and present simulated results that were achieved for different scenarios with heating and cooling. It turns out that the system's battery takes too long to cool down and warm up due to its large mass.

    This is because the battery does not reach the target temperature during the course of the simulation, which is run for 1 hour, and therefore not after the comfort time which is 10 minutes. Furthermore, the parts of the cabin reach the desired temperature within the simulation time, except during the cooling down of the cabin, where the roof cools more slowly than desired. The only part of the cabin that achieves the comfort time is the sides of the cabin when heated. Which means that optimizations to the system should be applied in order to achieve better and more realistic results.

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  • 25.
    Bajrami, Hannah
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Issa, Sebastian
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Litiums livscykel i batterier för eldrivna personbilar: En kartläggning av livscykeln för litium i fordonsbatterier med fokus2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This bachelor's thesis explores the lifecycle of recycled lithium in electric vehicle (EV) batteries, with a focus on lithium recycling and its environmental impact at different stages of recycled lithium's lifecycle. The objective is to gain insight into the environmental effects of primarily lithium but also other valuable materials in EV batteries as well as how their extraction, usage and recycling is influenced by political guidelines and regulations.

    The extraction process of lithium is examined, along with its impact. Additionally, various techniques for battery material recycling are investigated, such as pyrometallurgy, hydrometallurgy and direct recycling. These are then compared with each other in terms of environmental consequences, efficiency, and safety. The impact of policies and regulations on battery recycling is analyzed, specifically the guidelines provided by the European Union in the Green Deal.

    The literature review work was reinforced by an interview with a representative from Northvolt. These reviews have been beneficial due to the extensive research in the field, although a limitation is the lack of diverse perspectives in the articles. The interview with Northvolt provided insights into how companies are working to reduce environmental impact.

    In conclusion, this thesis shows that the most commonly used extraction methods of lithium have both positive and negative consequences on the life cycle of recycled lithium. Furthermore, findings of this thesis shows that there are political directives which have prompted companies to prioritize their sustainability focus. Consequently, companies that have already integrated sustainability as a core value have a competitive advantage over their counterparts who need to adjust to new guidelines and policies.

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  • 26.
    Baraj, Bexhet
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Cykeltidskartläggning automatiseradkärntillverkning2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis project is implemented at Scania Södertälje with the aim of mapping cycle times of the core making department at the new foundry. All measurement of cycle times to then be mapped is done to clearly visualize equipment and department capacity. The project began with the collection of all necessary information as a basis for carrying out the work and then suitable methods were chosen to achieve the goals.

    The result shows a pronounced cycle time mapping across the entire department with a clear identification of the bottlenecks that control the entire production. Using the chosen method, the bottlenecks were analysed in depth to find possible waste in the form of unnecessary movements to carry out the process.

    Improvement proposals were presented as a concluding part of the project's results and also as recommendations for continued improvement work to optimize production capacity.

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  • 27.
    Barosen, Martin
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Användning av virtuell teknik inom produktion: Studie om implementering av augmented reality och virtual reality inom produktionsindustrin2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today's manufacturing industry seeks continuous development of new technology to meet the consumers demands for mass-customized products. Smart technology and digitization mainly characterize what the latest and fourth industrial revolution can offer the manufacturing industry. Virtual technology such as virtual reality and augmented reality have existed in the entertainment industry and military purposes for a while. But in recent years, it has been introduced in the manufacturing industry.

    This study investigates how virtual technology is being used in the manufacturing industry and how it impacts the personnel and companies work. The study began with a literature review, where theses and reports regarding virtual technology in the manufacturing industry were examined. Furthermore, interviews were conducted with companies and researchers who actively work or develop this technology for the manufacturing industry. The interviews were conducted to build an understanding of its current state and what future work can be expected.

    The results from this study finds that virtual technology can facilitate and streamline some tasks in the manufacturing industry. However, further research and development need to be conducted to ensure that the technology truly contributes to the efficiency. The main advantages of virtual technology include more efficient instructions and communication for workers. The disadvantages of the technology are that it requires space and resources to operate and it can be ergonomically demanding for the staff. The technology is considered to still be in the development stage and companies are not prioritizing their business development. To get more companies interested in the technology, researchers and developers need to present clear and reliable results regarding the technology usage in manufacturing.

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  • 28.
    Bayati, Arastoo
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Increasing Data Driven Processes at an Industrial Company - A project performed at Scania2022Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Amidst a world with emerging problems in workforce shortages, environmentalimpact, and energy crisis, it has become essential to increase production efficiency.Having data driven processes using artificial intelligence and machine learning canbe a step towards the solution. Nevertheless, these applications rely heavily on datascientists being able to create high quality models. Complications can arise becausethe data is normally generated in conjunction with processes outside the datascientist’s competency. Therefore, it is of great importance that the personnelworking in proximity to the data generation are instilled with some competency ofdata science. So that they can, not only communicate and aid data scientists in theirwork but, perform data analysis themselves. Combining the results from a literaturereview and discussions with experts in the field of production and data science, afive-step plan was made that engineers can follow to have a value adding impactwhen working with data scientists. The content of this paper relates to an industrialsetting, namely Scania which is where the project was performed, but in essence thismethod can be used by anyone working with high volume data. 

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  • 29. Beglarzadeh, B.
    et al.
    Mayer, R.
    Archenti, Andreas
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Estimation of an elasto-geometric model exploiting a loaded circular test on a machine tool2022In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 123, no 7-8, p. 2331-2349Article in journal (Refereed)
    Abstract [en]

    A novel elasto-geometric model is introduced that simultaneously estimates joint compliances and geometric error parameters by employing the loaded double ball bar apparatus. The model parameters are estimated from tests at different force levels by distinguishing between errors that change with the applied force (compliance effect) from those that do not (geometric effects). At lower forces, the geometric errors are dominant while at higher forces compliance errors dominate. Using all data to build a single global geometry and compliance set of parameters (global constant compliance model), the radial volumetric variations due to geometric errors and compliance are estimated at 0.019 mm and 0.046 mm, respectively, making compliance dominant by more than three times. The impact of dominant and non-dominant equivalent global compliance CXXX, CYYY, CXYX, CCXY, CCYY, and CCCY on the loaded circular test readings at the highest force level of 742 N are predicted to be around 0.045, 0.034, 0.00058, 0.0022, 0.0014, and 0.0045 mm peak-to-peak, respectively. The impact of loaded geometric parameters EXX1, EYY1, EYX2, EXY2, EC(0Y)X, EXt0, and EYt0 on the loaded circular test readings is predicted to be around 0.019, 0.014, 0.0074, 0.012, 0.00017, 0.0076, and 0.0012 mm peak-to-peak, respectively. The dominant global compliances are CXXX and CYYY at 0.0619 and 0.0461 μm / N , respectively.

  • 30.
    Bellotti, Francesco
    et al.
    Univ Genoa, DITEN, Genoa, Italy..
    Berta, Riccardo
    Univ Genoa, DITEN, Genoa, Italy..
    Baalsrud Hauge, Jannicke
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Advanced Maintenance and Production Logistics. LBIBA Bremer Inst Prod & Logist GmbH, Bremen, Germany..
    Gentile, Manuel
    Natl Res Council Italy, Inst Educ Technol, Palermo, Italy..
    Jeuring, Johan
    Univ Utrecht, Dept Informat & Comp Sci, Utrecht, Netherlands..
    Schottman, Iza Marfisi
    Le Mans Univ, Le Mans, France..
    Ninaus, Manuel
    Karl Franzens Univ Graz, Inst Psychol, Graz, Austria..
    Veltkamp, Remco
    Univ Utrecht, Dept Informat & Comp Sci, Utrecht, Netherlands..
    Wanick, Vanissa
    Univ Southampton, Winchester Sch Art, Southampton, England..
    Alessandro De Gloria-1955-20232023In: INTERNATIONAL JOURNAL OF SERIOUS GAMES, E-ISSN 2384-8766, Vol. 10, no 1, p. 2-3Article in journal (Other academic)
  • 31.
    Benedicks, Johan
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Utveckling av hållare för regnmätare2024Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Currently rain gauges are used to ascertain rainfall data over specific areas to then be able to monitor weather conditions and dimension pipeline networks. For rain gauges to work they need to be stable and vertical to avoid measurement errors. The rain gauges must also be able to undergo maintenance work, which currently is done in an inefficient way as at least two people must be present for this type of work since it is carried out at a higher altitude.

    The goal of this thesis is to create concepts that can facilitate this work by making the rain gauge more easily accessible for one person to be able to carry out the work. To get there the writer has had discussions with people in the water and sewage industry who have shared their thoughts on this and come up with suggestions. Since then, different design methods have been used to create a variety of different ideas.

    The ideas have then been shown to the people involved and discussions about its function and cost did come along, where all parties could come with suggestions for improvements. This together with the fact that the writer has weighed the various ideas using a requirements matrix where the requirements that the holders need to meet have been set up in a matrix. Based on both the matrix and the discussions, two different concepts were then chosen that had the highest potential to be worked on further.

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  • 32.
    Bernabeu Fernandez De Liencres, Damian
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Machine Learning Demand Forecast for Demand Sensing and Shaping: Combine the existing work done with demand sensing and shaping to achieve a higher customer service level, customer experience and balancing inventory2024Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This master's thesis investigates the utilization of data-driven approaches for demand forecasting and inventory control in the context of Ericsson's supply chain management. The study focuses on the integration of machine learning, demand shaping, and real-time data to enhance accuracy and efficiency in these critical areas.

    The research explores the impact of machine learning techniques on demand forecasting, highlighting the significance of precise predictions in guiding production, inventory management, and distribution strategies. To address this, the study proposes the integration of real-time data streams and Internet of Things (IoT) devices, enabling the capture of up-to-date information. This integration facilitates prompt responses to evolving demand patterns, thereby optimizing supply chain operations.The research provides valuable insights for Ericsson to enhance its demand forecasting capabilities and optimize inventory management in a data-driven environment.

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  • 33.
    Bircan, Ebru
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Wartan, Garabet
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Utveckling av köksredskap: Omrörare som underlättar arbetet i köket2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis aims to produce a product proposal to develop a battery-powered stirrer, which at this time is unavailable on the market. The goal of the project is to create an automatic self-acting stirrer that facilitates work in the kitchen by streamlining and simplifying cooking when it comes to stirring food in pots and the like. The product is designed to contribute to time saving and improve the ergonomic experience in the kitchen. By following the product development process, four different concepts were developed and explored. After careful evaluation, we chose the most promising concept to move forward with. The concept represents our vision of an innovative and user-friendly mixer that can revolutionize kitchen work.

    The focus of the project has been to create a sustainable product that combines functionality, performance and ease of use. The result of this thesis was a self-acting stirrer which is presented with illustrations of CAD modeling and description of the product. Modern techniques and materials were used to achieve a high quality and sustainable product. With the help of specified computer applications, the appearance of the product has been visualized to give a clearer picture of its aesthetic properties. In addition, we have considered environmental aspects by minimizing energy consumption and ensuring efficient use of the battery.

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  • 34.
    Birkie, Seyoum Eshetu
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Process Management and Sustainable Industry.
    Chavez, Zuhara
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Process Management and Sustainable Industry.
    Lindahl, Emma
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Process Management and Sustainable Industry.
    Kurdve, Martin
    RISE Research Institute of Sweden, Gothenburg, Sweden.
    Bruch, Jessica
    Mälardalen University, Västerås, Sweden.
    Bellgran, Monica
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Process Management and Sustainable Industry.
    Bohlin, Lotta
    KTH.
    Bohman, Mikael
    AstraZeneca Sweden Operations, Södertälje, Sweden.
    Elvin, Malin
    Mälardalen University, Eskilstuna, Sweden.
    Systematic Green Design in Production Equipment Investments: Conceptual Development and Outlook2023In: Advances in Production Management Systems. Production Management Systems for Responsible Manufacturing, Service, and Logistics Futures - IFIP WG 5.7 International Conference, APMS 2023, Proceedings, Springer Nature , 2023, p. 174-188Conference paper (Refereed)
    Abstract [en]

    This paper explores the concept of green design in the context of production, focusing on investment projects for production equipment design and acquisition by a manufacturing firm. Research towards making manufacturing and production related activities more sustainable is increasing. In the manufacturing sector, environmental sustainability tends to be more commonly approached from the operations perspective. However, the decisions taken in the design phase of the production equipment significantly impact the operations phase. Therefore, proactive design approaches for sustainability applied in product design settings could be transferred to the design of the production equipment to build in green aspects from the outset. This study explores the research questions of what green production equipment design entails and how the concept of green design has evolved in the context of production. Overall, this conceptual paper highlights the importance of incorporating green design principles from the outset of the production design. Transferable methodological issues are also explored for further detailed investigation in the production equipment design context. Strong collaboration between equipment suppliers and the buying manufacturer that aims to integrate sustainability as part of requirements is proposed as an enabler for the way forward. The paper also provides insights into the evolution of the concept in this context for possible future research.

  • 35.
    Björklund, Emil
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Christiansen Rudhe, Martin
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Konstruktionsförslag på fallskärmssystem till flygkropp2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The objective of this thesis was to investigate and develop a design proposal for a recovery module for Saab's missile system, RBS15, which would enable component reusability and facilitate evaluations of the missile. Similar systems are utilized by other companies in the defense industry to assess their products.

    The thesis project has explored various aspects of the recovery system, including parachute initiation analysis, dimensioning of parachutes with their affiliated attachment points, and packing studies of the parachute system. Literature reviews, interviews, and simulations have been employed as methods to analyze and model the system and its components.

    Calculated forces and flight trajectory demonstrate that the existing frames and attachment points on the missile can withstand the load from the parachute system. The conclusion is that a recovery module for RBS15 holds significant potential. With this system, the missile could be effectively reused and evaluated, which can lead to economic benefits and facilitating future system development.

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  • 36.
    Blomkvist, David
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Incorporation of GNSS system for underwater cleaning robot2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Water reservoirs, such as swimming pools, are usually cleaned using underwater cleaners, also called pool robots. These robots usually use a randomized pattern to cover the bottom areas. For large and/or complex bottoms, a randomized cleaning pattern may be ineffective.

    The thesis carried out at Weda, aims to propose a solution for an autonomous pool cleaner incorporating GPS technology to improve cleaning and reduce the time and costs of the cleaning process. To achieve this, an existing pool robot will be used, and a GPS module will be attached to the robot. The GPS tracks the position and feeds it back to the pool robot control unit. Since the pool robot central unit now knows the position and path, it will be possible to control the cleaning in a much more efficient way.

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  • 37.
    Boateng, Kevin
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Holm, Erick Lucian Matias
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Kit-box mekanism2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of the project was to develop a concept for a shelf trolley for EQpack, intended to be used on factory floors by assemblers. The shelf trolley must be able to carry kit boxes with components and take up less floorspace than existing shelf trolleys for kit boxes.

    EQpack's idea was to, unlike conventional shelf trolleys, in which kit boxes are placed next to each other horizontally and transported by conveyor belts, instead have shelf trolleys where kit boxes can be placed vertically in relation to each other. Some form of mechanism must enable piecemeal lowering of kit boxes for the assembler. How this is done was subject for development in the project.

    The development of the shelf trolley took place in four phases; analysis and boundaries, fact-gathering, exicution and evaluation. As a preliminary study, existing trolleys in a factory have been observed at work and discussions have been held with the various users about their views. Through discussion with supervisors the expectations, requirements and boundaries were set. The execution consisted of development of various ideas and testing their functionality with Lego. The different concepts were analyzed and compared with a puhg matrix.

    With the chosen Lego model as a basis, a CAD model was made with standardized components as suggestions for how a final product could be constructed. The final model was measured to take up about a quarter of the floorspace that the conventional trolley occupies.

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  • 38.
    Boffa, Eleonora
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Maffei, Antonio
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Industrial Production Systems.
    Development and application of an Integrated Business Model framework to describe the digital transformation of manufacturing - a bibliometric analysis2023In: Production & Manufacturing Research, E-ISSN 2169-3277, Vol. 11, no 1, article id 2164952Article in journal (Refereed)
    Abstract [en]

    The digitalisation trend is affecting the manufacturing industry byadopting several emerging technologies that can increase the efficiencyand output of production processes and operations. A growingbody of literature shows that this trend demands a structuralrethink of how companies do business. However, there is a lack ofholistic contributions describing how aspects of manufacturing digitalisationalign with the Business Model Innovation process. Thisstudy uses a bibliometric mapping approach to analyse the literatureon manufacturing digital transformation through the IntegratedBusiness Model (IBM) lens. The results identify the major researchtopics discussed in the analysed domain and propose an enrichedIBM framework with specific descriptions and connections amongthe components and their relative strengths. Holistically, the resultingenhanced model may ultimately assist practitioners in understandingthe innovation process of the BM triggered bytechnological shifts in their manufacturing, enabling an alignmentof the manufacturing strategy with IBM’s components.

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  • 39.
    Boffa, Eleonora
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Maffei, Antonio
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    How does Manufacturing Strategy Impact the Goals of a Firm?: A Relational Framework Characterizing the Related Business Models' Components2023In: Management and Production Engineering Review, ISSN 2080-8208, E-ISSN 2082-1344, Vol. 14, no 2, p. 18-36Article in journal (Refereed)
    Abstract [en]

    The fourth industrial revolution has resulted in technology advancements in the manufacturing industry. However, the innovation potential embedded in these technologies should be unlocked by a viable application, i.e., the business model (BM). The BM as a holistic concept featuring different interacting elements is thus emerging as a promising vehicle for innovation. Current BM research describes the entire domain but lacks depth in the characterization of its individual components. This paper investigates the available manufacturing literature through the lens of the BM concept performing a scientometric analysis. The results are presented in a relational framework that provides an in-depth characterization of the manufacturing element of the BM and highlights identified connections that link the BM components. This is the basis for tools that will support firms in developing manufacturing portfolios aligned with their strategic goals.

  • 40.
    Boffa, Eleonora
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Industrial Production Systems.
    Maffei, Antonio
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Industrial Production Systems.
    Investigating the impact of digital transformation on manufacturers’ Business model: Insights from Swedish industry2024In: Journal of Open Innovation: Technology, Market, and Complexity, E-ISSN 2199-8531, Vol. 10, no 2, article id 100312Article in journal (Refereed)
    Abstract [en]

    Digital transformation (DT) triggers a fundamental technological shift in industry enabling the creation of smart and connected factories. DT is not only a technology-driven innovation approach: it also requires changes of the Business Model (BM). Despite this, there is a lack of comprehensive studies that examine how aspects of manufacturing digitalisation align with the Business Model Innovation (BMI) process. To address this gap, this paper analyses the DT journey of several Swedish medium and large firms through semi-structured interviews with staff involved in such process. The empirical findings reveal that the BM elements addressing value creation and strategy aspects are the most affected by DT. Additionally, this study identifies the links among such elements. The findings are compiled in a holistic framework that can serve as a blueprint for practitioners seeking to adopt digital technologies in their production environments. This holistic approach aims at supporting practitioners to understand the BMI process triggered by DT and consequently aligning their manufacturing strategy with the BM's components.

  • 41.
    Bohl, Marcus
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Sagici, Berivan
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Visualisering av BLC:s verksamhet: Skapande av en flödesmodell av organisationens funktioner2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The city of Stockholm started an environmental initiative in 2013 which gave rise to the organization Bygglogistikcenter (BLC), which aims to use and promote sustainable logistical solutions within the construction industry in the district of Norra Djurgårdsstaden. The report encompasses a visualization of the organization BLC by creating a flowchart model describing the organization's functions.

    Identifying a suitable method for creating a flowchart describing the functions of the organization is the main goal of the report. The flowchart aims to clarify and visualize what the organization can provide and how it functions from a deeper perspective than the current existing description.

    Through a case study and literature study the method Data flow diagram (DFD) was devised as a suitable alternative for creating a flowchart of BLC. By combining the graphic tool Google Teckningar and the method DFD a visualization of a flowchart was made possible. The resulting flowchart was a DFD of three levels, Context, Level-0, and Level-1. The Context level is the most comprehensive of the three showing how the system of BLC integrates with external components. The Level-0 diagram describes what functions the system of BLC is made up of and how and what data flows between those functions. At last, the Level-1 diagram describes how and what data that flows between functions within a function from the Level-0 diagram.

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  • 42.
    Bohlin, Lotta
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Circular production investments: What a circular production investment is and how it can be designed2023Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    One of the biggest emitters of greenhouse gas in Sweden is the industry sector, and in order to reach the national and global environmental goals, a change is needed. To become an environmentally sustainable producer, the whole life cycle must be taken into consideration, from choice of resources, to production, to use, and End-of-Life treatment. This thesis covers production, more particularly production equipment and the sustainability aspect circularity. Two research questions are answered; what is a circular production investment, and how can a production investment be designed to reach a higher level of circular maturity? Circularity, or circular economy, aims to close the loop of resources, and this thesis covers various aspects of how production equipment, and investments of production equipment can be designed to achieve that. The frame of reference presents models and tools for circularity, as, for instance, life cycle assessment, life cycle cost, life cycle extension strategies, eco-design, and servitization.

    This research was done through a literature review, a survey, in-depth-interviews, and a final validation workshop. It has been found that there are many aspects to consider when investing in production equipment, but also that there is a knowledge gap in industry of what circularity is and how to prioritize circularity in the requirements from customer to supplier. This thesis was written as a part of a collaborative research project between academy, research, and industry. The findings in this thesis were used to develop three guidelines made for practical implementation within industry, they cover considerations before investing in new production equipment, how to design production equipment in the most circular way, and considerations at End-of-Life or End-of-Use for production equipment. In order for a production investment to be circular, it is required that the treatment of equipment at its End-of-Life is planned already in the design phase of the investment, and that an investment is implemented only if there are no other options.

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  • 43.
    Boström Leijon, Simon
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Simulation of wire bending processes in continuous wave winding stator production2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Electric propulsion in the heavy truck industry require knowledge in certain new areas involved in electric machine manufacturing. One of these new manufacturing steps is copper bending for production of stator windings. This thesis aimed to look at whether finite element simulations can be used in gathering experience to improve an existing stator design. Existing winding scheme is modeled, and simplified cases of different bending steps are simulated using finite element method. The result shows the critical areas where the largest stress and strain occurs in the existing design, giving input of how the bending affects the copper wire as well as the isolation layer of the wire, to improve future bending scheme designs.

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  • 44.
    Buchner, Felix
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Industriella produktionssystem.
    Automating the Part Identification Method of Automotive Assembly Lines Through RFID Technology2022Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Barcode scanning has been used for many decades in the assembly process to identify individual parts. Besides the fact that scanning is a non-value-adding operation, it also is prone to error. It cannot beensured with certainty that the scanned part will be the part installed. Furthermore, if any part is interchanged, it leaves the manufacturer with the challenge of detecting this and correcting the data. The genealogy data is important as it enables precisely tracing which parts are built into which vehicle. Strong confidence in the integrity of the genealogy data allows a manufacturer to minimize the scope assembly line uptime. When scan errors occur, the factory execution system could stop the production line to fix the issue and ensure high quality. Therefore, this thesis proposes an alternative and innovative approach to the part identification and verification process in an assembly line. The approach is to replace the traditional barcode with a passive ultra-high frequency RFID label. It automates the identification process when a part is installed in the vehicle, which makes manual scanning redundant. The suggested approach also proposes a final traceability scan. Hereby the completely assembled vehicle and its components with the RFID tags are read again to verify the same parts are still installed. The result would be enhanced genealogy data of each vehicle. This thesis aims to determine the technical feasibility of both processes and investigate the economic feasibility.

    The conducted empirical research of this thesis is based on a literature review about RFID technology and its applications. To prove the technical feasibility, a series of experiments were carried out for the in-station part identification and the final traceability verification. With a determined number of test parts, a total of 498 experiments were conducted in a real production environment. Moreover, the proposed dual-antenna approach and software logic enables accurate part identification. Lastly, for the assessment of the economic feasibility, a comprehensive data model was developed to assess the production impact of scanning. 

    Literature and a theoretical investigation show that most of the already consumed scan results can be related to human errors. The experiments for the automated in-station identification reveal; that it is possible to accurately identify the installed part under at least one setup with the suggested dual-antenna approach. However, every single part needs its setup adjusted to the environment in which it is assembled. There is not one out-of-the-box solution that suits every individual application. The finding from the final traceability scan experiment is that all tested parts are identified by the determined setup. It becomes apparent that reading the individual parts even after a car is completed is possible, despite the interference of the metal chassis and radio frequency waves. The conclusion from the economic feasibility is that although the RFID tags are more expensive than barcode labels, the implementation could still offer significant financial benefits to a manufacturer. To summarize the topic, the proposed method based on RFID technology is an innovative approach that is technically feasible and offers a variety of benefits.

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  • 45.
    Carlsson, Torgny E.
    et al.
    KTH, Superseded Departments (pre-2005), Production Engineering.
    Nilsson, Bengt
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Gustafsson, Jonny
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    System for acquisition of three-dimensional shape and movement using digital Light-in-Flight holography2001In: Optical Engineering: The Journal of SPIE, ISSN 0091-3286, E-ISSN 1560-2303, Vol. 40, no 1, p. 67-75Article in journal (Refereed)
    Abstract [en]

    In the development of new products there are two parallel lines for the development process to follow: the traditional or "real" and the new computer aided or "virtual." The traditional line is to develop prototypes that can be used for testing strength, functionality, and visual appearance of the product. In the virtual line digital (CAD) models are developed that can be tested entirely in a computer by simulations, e.g., using finite element analysis (FEA) and other tools. For transformation from the real to the virtual world some kind of 3-D acquisition system is needed. The shape of the model should be measured together with further data concerning the visual appearance, material properties, etc. We develop electronic recording techniques for doing this based on the Light-in-Flight technique. This technology has all the advantages of holography, i.e., apart from the shape it is also possible to measure how much light is reflected from different parts of the object along with interferometric information, which can give mechanical data for the object. This can be used, for example, for visualization and to give tactile and haptic information to a virtual reality system about how the object would be perceived by a person touching it.

  • 46.
    Carlsson, Torgny
    et al.
    KTH.
    Nilsson, Bruno
    KTH.
    Gustafsson, Jonny
    KTH, School of Industrial Engineering and Management (ITM), Production engineering. Holovision AB (Sweden).
    Abramson, Nils H.
    KTH.
    Practical system for time-resolved holographic interferometry1991In: Optical Engineering: The Journal of SPIE, ISSN 0091-3286, E-ISSN 1560-2303, Vol. 30, no 7, p. 1017-1022Article in journal (Refereed)
    Abstract [en]

    An easily implemented and easily manageable system for time-resolved holographic interferometry is presented. The system consists of a multiple-pulsed Q-switched ruby laser and a rotating disk having radial slits with a constant angular separation. The disk is used to scan the reference beam along a holographic plate, thereby achieving spatial multiplexing. Since the influence on the beam is negligible and a single slit is illuminated by every laser pulse, there is no need for synchronization. The interferometric pattern is achieved by removing the disk and exposing a reference image on the holographic plate. The system may serve as an excellent tool for full-field dynamic measurements. A simple experiment has beem performed showing a sequence of momentary interference patterns on a vibrating plate.

  • 47.
    Carlsson, Victor
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Granat, Victor
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Manufacturing batteries of the future: Critical challenges and undertakings to create the next generation energy storage2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In today's world, a dominating piece of news is the global race for large-scale production of Lithium-ion batteries (LIB). LIBs are important because they have become the most widely used type of rechargeable battery in modern electronic devices, such as smartphones, laptops, energy storage systems, and electric vehicles. This has been most prominently noticed and mentioned in the transition for automakers to move away from traditional internal combustion engines to electric vehicles.

    The Paris agreement, the EU ban on the sale of petrol and diesel cars by 2035, and the United States's Inflation Reduction Act push the envelope on the need to transition towards emission-free vehicles. Therefore, large investments across the globe have been made to mass-produce high-performing batteries. The largest investments have been made in building "Gigafactories," aptly named after how many "Gigawatt Hours" the batteries produced by the factory have capacity for. The reason for such great investments made in LIB technology and its array of potential chemistries stems from a number of factors which include its high energy density, long cycle life, and fast charging capability.

    Nevertheless, significant investments to gain a competitive advantage in being able to manufacture the next generation of batteries have also been made. There are a number of potential technological candidates for the next generation of energy storage, but one stands out above the rest: the Solid State Battery (SSB). It is a promising new type of battery technology that changes the traditional structure of a LIB from a liquid electrolyte to a solid one. In theory and in labs, SSBs have shown to have several promising advantages over the LIBs, in regards to higher energy density, longer cycle life, and increased safety. SSBs are also shown to be more environmentally friendly, an aspect which is becoming more and more an area of focus for manufacturers due to higher sustainability demands from consumers. While there are still technical and manufacturing challenges that need to be overcome before solid-state batteries become widely available, their potential advantages make them a promising technology for the future of energy storage.

    However, as concluded in this report, commercial production of SSBs is currently not possible. Several key challenges are yet to be overcome in the material realm. Materials presently used in the production of SSBs work in incredibly low production environments such as laboratories where every single factor can be accounted for. Presently, things like a single crystal material, pressure, and temperature problems have raised quite a lot of questions on the importance of a quick industrialization of SSBs, and therefore the technology might be too immature for implementation today.

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  • 48.
    Carvalho, Clive
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Enhancing Stock Management Efficiency at Excillum AB2023Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis work aims to improve the stock management system of Excillum AB, a Stockholm-based company that specializes in high-performance X-ray sources. The current stock management system has limitations, resulting in gaps when managing the inventory. To address this, the study focuses on developing a calculation model that takes into account various factors such as the global supply chain, customer expectations, service offerings, and financial concerns. The research questions revolve around understanding best practices in stock management from other companies, considerations for stock selection and ordering decisions, and additional parameters to ensure accurate safety stock calculations. The research involves carrying out a literature review, benchmarking practices from other organizations, analyzing Excillum's transaction data, and developing a reliable calculation model. However, some limitations exist, such as relying on Excel for calculations rather than changing values within the ERP system, which reduces demand projection accuracy due to high product customization. Human factors and unavoidable supply chain disruptions are not specifically addressed in the recommended approach. The proposed calculation model aims to improve stock management efficiency, ensure product availability, reduce stockouts, and ultimately contribute to Excillum's growth goals while meeting customer demands. Excillum can optimize stock levels and streamline inventory management by incorporating best practices and taking into account critical factors, establishing the way for long-term success and improved customer satisfaction.

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  • 49.
    Chahine, Mikael
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Fenon, George
    KTH, School of Industrial Engineering and Management (ITM), Production engineering.
    Additiv tillverkning av verktyg inom produktion2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Additive manufacturing and 3D-printers is a type of technology that has been on the market since 1984. The technology has since then evolved, and it has become a phenomenon which industries all over the world actively use during production. This essay however covers the area of use for the machine, primarily production of tools for use in the industry, profitability and what risks the industry should be aware of. The sources used in this essay derive from the KTH library and interviews conducted with respondents from different companies working in the production industry. The result presented in this essay is that the profitability depends on area of usage and manufacturing volume. This essay portrays that mass production is not as profitable compared to when additive manufacturing is used when constructing prototypes or tools that are made-to-order.

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  • 50.
    Chavez, Zuhara
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Process Management and Sustainable Industry.
    Arvidsson, Ala
    Chalmers University of Technology, Gothenburg, Sweden.
    Baalsrud Hauge, Jannicke
    KTH, School of Industrial Engineering and Management (ITM).
    Bellgran, Monica
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Process Management and Sustainable Industry.
    Birkie, Seyoum Eshetu
    KTH, School of Industrial Engineering and Management (ITM), Production engineering, Process Management and Sustainable Industry.
    Johnson, Patrik
    Chalmers University of Technology, Gothenburg, Sweden.
    Kurdve, Martin
    Chalmers University of Technology, Gothenburg, Sweden.
    From Surviving to Thriving: Industry 5.0 at SMEs Enhancing Production Flexibility2023In: Advances in Production Management Systems: Production Management Systems for Responsible Manufacturing, Service, and Logistics Futures, Springer Nature , 2023, p. 789-802Conference paper (Refereed)
    Abstract [en]

    This study explores how human-centered digitalization can contribute to the flexibility and adaptability of small and medium-sized enterprise (SME) production processes, resulting in more resilient systems. This study explains the relationship between digital technologies and production system features through progressively more human-centric stages of a digitalized manufacturing system. The authors present a case study of an SME that implemented a human-centric strategy, placing people's needs and interests at the center of its processes, leading to more flexible and inclusive production processes and consistent with the goals of Industry 5.0. The results suggest that a digitalized working method that considers human capabilities and needs can enable a more diverse workforce and the rapid setup of new and additional production processes, thus helping SMEs respond to supply chain disruptions. The findings have implications for managers and practitioners interested in driving or supporting the transition of SMEs to human-centric, resilient, and sustainable businesses.

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