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International Studies in Phenomenology and Philosophy

Journal | Volume | Article

216913

Should probabilistic design replace safety factors?

Neelke DoornSven Ove Hansson

pp. 151-168

Abstract

Safety is a concern in almost all branches of engineering. Whereas safety was traditionally introduced by applying safety factors or margins to the calculated maximum load, this approach is increasingly replaced with probabilistic risk assessment (PRA) as a tool for dimensioning safety measures. In this paper, the two approaches are compared in terms of what they aim at and what they can, in fact, achieve. The outcome of this comparison suggests that the two approaches should be seen as complementary rather than mutually exclusive. PRA is particularly useful for priority setting and for the effect evaluation of safety measures; however, in most applications, uncertainties prevent PRA from providing an objective probability of failure or value of damage. Safety factors are indispensible for dealing with dangers that cannot be assigned meaningful probabilities.

Publication details

Published in:

(2011) Philosophy & Technology 24 (2).

Pages: 151-168

DOI: 10.1007/s13347-010-0003-6

Full citation:

Doorn Neelke, Hansson Sven Ove (2011) „Should probabilistic design replace safety factors?“. Philosophy & Technology 24 (2), 151–168.