Safety Barrier
Function Analysis for Evaluation of New Systems in a Process Industry: How Can
Expert Judgments be Used? Ola Svenson, Department of Psychology, Stockholm University, S - 106
91 Stockholm Sweden and Business School, University of Leeds, Leeds LS2 9JT
United Kingdom
This
paper presents a barrier function analysis approach to safety assessments of
complex systems as a complement to other methods for safety analysis. The
analysis starts with a task analysis and uses expert judges to assess the degree
of safety for each step in the process, barrier functions available, their
strengths and the consequences of missing or inefficient barrier functions. In
contrast to many other applications, a group of experts, instead of one expert,
provided judgments in the application of the method to a nuclear refueling
process used as an illustrative example. One advantage of the method is that it
explicitly integrates human factors organizational processes with technical
computer processes in the analysis. It is argued that a barrier function
analysis approach is a valuable complement to other methods for safety analysis.
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