Journal
SAFETY SCIENCE
Volume 49, Issue 8-9, Pages 1080-1086Publisher
ELSEVIER
DOI: 10.1016/j.ssci.2011.04.017
Keywords
Risk; Uncertainties; Probabilities; Possibility theory; Imprecison intervals
Funding
- Research Council of Norway
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In engineering risk assessments, probability is the common tool used to describe the epistemic uncertainties about unknown quantities. Probability is considered a main component of risk. However, a number of alternative approaches exist for representing and describing uncertainties in risk assessments, including possibility theory and evidence theory. For these approaches and theories a probability-based risk definition cannot in general serve as a conceptual framework for risk assessments. A broader risk perspective is required. The purpose of the present paper is to present such a perspective and show how both the probabilistic and the alternative approaches and theories can be supported by this perspective. The key feature of this perspective is that uncertainty replaces probability in the definition of risk. (C) 2011 Elsevier Ltd. All rights reserved.
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