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RESEARCH PAPERS

Uncertainty Analysis in Quantitative Risk Assessment

[+] Author and Article Information
S. Quin, G. E. O. Widera

Department of Mechanical and Industrial Engineering, Marquette University, 1515 West Wisconsin Avenue, Milwaukee, WI 53233

J. Pressure Vessel Technol 118(1), 121-124 (Feb 01, 1996) (4 pages) doi:10.1115/1.2842154 History: Received May 27, 1994; Revised June 06, 1995; Online February 11, 2008

Abstract

Of the quantitative approaches applied to inservice inspection, failure modes, effects,criticality analysis (FMECA) methodology is recommended. FMECA can provide a straightforward illustration of how risk can be used to prioritize components for inspection (ASME, 1991). But, at present, it has two limitations. One is that it cannot be used in the situation where components have multiple failure modes. The other is that it cannot be used in the situation where the uncertainties in the data of components have nonuniform distributions. In engineering practice, these two situations exist in many cases. In this paper, two methods based on fuzzy set theory are presented to treat these problems. The methods proposed here can be considered as a supplement to FMECA, thus extending its range of applicability.

Copyright © 1996 by The American Society of Mechanical Engineers
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