2013
DOI: 10.1002/prs.11640
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The interface of functional safety with process safety and risk analysis

Abstract: The fundamental requirement of the IEC 61511/ISA 84 standard on Safety Instrumented Systems (SIS) is to establish the Safety Integrity Levels (SILs) required for Safety Instrumented Functions (SIFs) by evaluating process risks and comparing them to risk tolerance criteria. This article addresses issues that impact the determination of SILs for SIFs and their implications for use of the standard. The issues largely revolve around the interface of the standard with process safety and risk analysis. They include … Show more

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