Evaluating Safety Integrity Level in presence of uncertainty
Résumé
The safety standards ANSI/ISA S84.01-1996 and IEC 61508 address the application of Safety Instrumented Systems (SIS) to take a process to a safe state when predetermined conditions are violated. A critical aspect of conformance with the standards is the establishment of Safety Integrity Level (SIL) for SIS. This paper presents a fuzzy/possibilist approach for determining the SIL of the SIS in presence of uncertainty.
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