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Tool Integration, from Tool to Tool Chain with ISO 26262
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Mechatronics.ORCID iD: 0000-0001-5704-4504
(Mekatronik, Mechatronics)ORCID iD: 0000-0002-4300-885X
(Mekatronik, Mechatronics)
(Mekatronik, Mechatronics)ORCID iD: 0000-0002-0889-5190
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2012 (English)Conference paper (Refereed)
Abstract [en]

The use of innovative power sources in future cars has long-ranging implications on vehicle safety.  We studied these implications in the context of the guidance on software tool qualification in the then current ISO 26262 draft, when building an urban concept vehicle to participate in the 2011 Shell Eco-Marathon. While the guidance on tool qualification is detailed, the guidance in regard to tools integrated into tool chains is limited. It only points out that the environment that tools execute in needs to be taken into consideration.

In this paper we clarify the implications of tool chains on tool qualification in the context of ISO 26262 by focusing on answering two questions; first, are there parts of the development environment related to tool integration that are likely to fall outside of tool qualification efforts as currently defined by ISO 26262; secondly, can we define if, and -if so- how, tool integration is affected by ensuring functional safety.

We conclude by identifying two areas related to tool integration that are likely to fall outside the tool qualification efforts (data integrity and process logic) and describing how different constraints imposed by ISO 26262 in relation to tool qualification conflict when tool integration is improved (improvements aimed at supporting completeness, consistency and the safety lifecycle vs. tool qualification cost).

We are able to make additional conclusions in relation to the State of the Art discussion on software tool qualification according to ISO 26262. First, reference tool chains and guidelines on which characteristics tool qualification should ensure for tool chains are needed to complement ISO 26262. Secondly, guidance on tool integration can be found in the completeness characteristic, the consistency characteristic and the ISO 26262 safety lifecycle process. Finally, qualification efforts should ideally target tool chains rather than individual tools.

Place, publisher, year, edition, pages
SAE International , 2012.
Keyword [en]
Tool Integration, Safety, ISO 26262
National Category
Embedded Systems
URN: urn:nbn:se:kth:diva-93884DOI: 10.4271/2012-01-0026ScopusID: 2-s2.0-84877167104OAI: diva2:524488
SAE 2012 World Congress

QC 20120927

Available from: 2012-05-02 Created: 2012-05-02 Last updated: 2012-09-27Bibliographically approved
In thesis
1. Tool Integration and Safety: A Foundation for Analysing the Impact of Tool Integrationon Non-functional Properties
Open this publication in new window or tab >>Tool Integration and Safety: A Foundation for Analysing the Impact of Tool Integrationon Non-functional Properties
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The increasing complexity of embedded systems development is becoming difficult to handle with development environments based on disjoint engineering tools. Support for interactions between various engineering tools, especially through automated means, has therefore received an increased amount of attention during the last few years. The subsequent increase in the amount of tool integration is leading to an increased impact of tool integration on non-functional properties of development efforts, development environments and end products. At the same time there is a lack of methods and tools for analysing the relationship between these properties and tool integration. To establish a foundation for analysing this generic relationship, the specific relationship between tool integration and the safety of end products is analysed in this thesis.

A survey was conducted to analyze the State of the Art of tool integration as related to safety. This survey specifically identified the lack of an efficient handling of tool integration by modern safety standards as an important concern. In relation to this survey, three theories were identified as of specific importance. These are the school of thought known as Systems Thinking, the Systems-Theoretic Accident Model and Processes (STAMP) causality model and the System-Theoretic Process Analysis (STPA) hazard analysis technique.

Building on these theories, this thesis provides original contributions intended to (1) describe concepts and models related to tool integration and safety (the first and second contribution), (2) link tool integration to safety in a way that reduces complexity during analysis (the third contribution) and (3) propose how to interpret and make use of the implications of the presented theories and the first three contributions (the fourth and fifth contribution).

• The first contribution is a new conceptual model of a development effort that emphasizes tool integration.

• The second contribution is a new reference model for tool integration in highly heterogeneous environments.

• The third contribution consists of nine safety-related tool chain properties, i.e. properties of tool chains that could mitigate at least part of the risks introduced by tool integration.

• The fourth contribution is a proposition on how to identify safety implications due to a high level of automation of tool integration.

• The fifth contribution is a proposition for a new software tool qualification process.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. xiii, 84 p.
Trita-MMK, ISSN 1400-1179 ; 2012:17
Tool Integration, Integrated Development Environments, Embedded Systems, Safety Standards, Certification, Qualification, Systems Thinking, System Safety, STAMP, STPA
National Category
Embedded Systems
urn:nbn:se:kth:diva-102876 (URN)978-91-7501-487-6 (ISBN)
2012-10-05, B319, Brinellvägen 85, KTH, Stockholm, 09:00 (English)
Available from: 2012-09-27 Created: 2012-09-27 Last updated: 2012-09-27Bibliographically approved

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