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Generalizing the Safety Factor Approach
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Filosofi och teknikhistoria, Filosofi.
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Filosofi och teknikhistoria, Filosofi.ORCID-id: 0000-0003-0071-3919
KTH, Skolan för teknikvetenskap (SCI), Hållfasthetslära (Inst.).
2006 (engelsk)Inngår i: Reliability Engineering & System Safety, ISSN 0951-8320, E-ISSN 1879-0836, Vol. 91, nr 8, s. 964-973Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Safety factors (uncertainty factors) are used to avoid failure in a wide variety of practices and disciplines, in particular engineering design and toxicology. Although these two areas have similar problems in their use of safety factors, there are no signs of previous communication between the two disciplines. The present contribution aims at initiating such communications by pointing out parallel practices and joint issues between the two disciplines. These include the distinction between probabilistic variability and epistemic uncertainty, the importance of distribution tails, and the problem of countervailing risks. In conclusion, it is proposed that future research in this area should be interdisciplinary and make use of experiences from the various areas in which safety factors are used.

sted, utgiver, år, opplag, sider
2006. Vol. 91, nr 8, s. 964-973
Emneord [en]
Safety factor, Uncertainty, Uncertainty factor, Uncertainty function, Variability
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-6000DOI: 10.1016/j.ress.2005.09.002ISI: 000238936100011Scopus ID: 2-s2.0-33748677263OAI: oai:DiVA.org:kth-6000DiVA, id: diva2:10565
Merknad
QC 20101110. Uppdaterad från In press till Published (20101110).Tilgjengelig fra: 2006-04-14 Laget: 2006-04-14 Sist oppdatert: 2017-12-14bibliografisk kontrollert
Inngår i avhandling
1. Is it safe? safety factor reasoning in policy-making under uncertainty
Åpne denne publikasjonen i ny fane eller vindu >>Is it safe? safety factor reasoning in policy-making under uncertainty
2006 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis examines the practice of using safety factors in decision-making under uncertainty, in particular in the areas of toxicology and civil engineering. The aim is to expose and clarify some of the philosophical issues surrounding the practice.

Paper I (co-written with Sven Ove Hansson and Fred Nilsson) gives an historical background to the practice of formal safety factor and safety margin use. The notion of an uncertainty function is presented as a more general concept covering safety margins, safety factors and the related uncertainty factors. Three categories of uncertainty functions are identified: explicit, implicit and natural safety reserves. Finally, the problems of countervailing risks and distribution arbitrariness are discussed.

Paper II (co-written with John Cantwell) discusses the relation between decision-making with safety factor rules and the ideal of formal normative decision theory. The role of safety factor rules in practical and theoretical reasoning is also examined and certain difficulties regarding normative evaluation of safety factor rules are pointed out.

Paper III (co-written with Sven Ove Hansson) looks at two current regulatory systems under development: Eurocodes for construction and REACH for chemicals. The two regulations have many similarities but reactions to them have been highly divergent. The differences are discussed and some hypotheses as to their explanation are suggested.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2006. s. 6
Serie
Theses in philosophy from the Royal Institute of Technology, ISSN 1654-627X
Emneord
safety factor, uncertainty factor, uncertainty function, uncertainty, rationality, policy, decision, science, risk
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-4053 (URN)91-7178-405-5 (ISBN)
Presentation
2006-06-14, Seminarierummet, Teknikringen 78 B, 2 tr., Stockholm, 14:00
Opponent
Veileder
Merknad
QC 20101110Tilgjengelig fra: 2006-04-14 Laget: 2006-04-14 Sist oppdatert: 2010-11-10bibliografisk kontrollert
2. Dealing with uncertainty
Åpne denne publikasjonen i ny fane eller vindu >>Dealing with uncertainty
2012 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Uncertainty is, it seems, more or less constantly present in our lives. Even so, grasping the concept philosophically is far from trivial. In this doctoral thesis, uncertainty and its conceptual companion information are studied. Axiomatic analyses are provided and numerical measures suggested. In addition to these basic conceptual analyses, the widespread practice of so-called safety factor use in societal regulation is analyzed along with the interplay between science and policy in European regulation of chemicals and construction.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2012. s. 25
Serie
Theses in philosophy from the Royal Institute of Technology, ISSN 1650-8831 ; 40
Emneord
safety factor, safety margin, uncertainty factor, uncertainty function, uncertainty, information, risk, risk assessment, risk management, epistemology, science, reasoning
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-72680 (URN)978-91-7501-216-2 (ISBN)
Disputas
2012-02-17, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad
QC 20120202Tilgjengelig fra: 2012-02-02 Laget: 2012-02-01 Sist oppdatert: 2012-02-02bibliografisk kontrollert

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