Title
The effect of parameter uncertainty on achieved safety integrity of safety system.
Abstract
This paper introduces the concept of safety-related (SR) uncertainty and the methodology to measure SR uncertainty. SR uncertainty is concerned with the effect of parameter uncertainty on the uncertainty of system unsafety (defined with respect to achieve safety integrity level), which is in direct contrast to the effect on overall system uncertainty. The properties of SR uncertainty are discussed and its significance in analyzing safety systems is highlighted. The conventional global sensitivity analysis (GSA) to handle overall uncertainty is inappropriate when SR uncertainty is of interest. We present and discuss four methods to measure SR uncertainty. Three examples are used to demonstrate the effectiveness of the proposed methods in comparison with GSA.
Year
DOI
Venue
2012
10.1016/j.ress.2011.10.015
Reliability Engineering & System Safety
Keywords
DocType
Volume
Safety system,Importance measure,Safety-related uncertainty,Global sensitivity analysis,Safety integrity level
Journal
99
Issue
ISSN
Citations 
null
0951-8320
5
PageRank 
References 
Authors
0.56
7
3
Name
Order
Citations
PageRank
Ming Xu1143.24
Tao Chen2131.53
Xianhui Yang3586.95