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Viewpoint on ISA TR84.0.02 Simplified Methods and Fault Tree Analysis

This is from a series of articles reprinted from the journal ISA Transactions. All ISA Transactions articles are free to ISA members, or can be purchased from Elsevier Press.

Abstract: ANSI/ISA-S84.01-1996 and IEC 61508 require the establishment of a safety integrity level for any safety instrumented system

 

PFDavg for 1oo2 voting devices with common cause PFDavg for 1oo2 voting devices with common cause

 

or safety related system used to mitigate risk. Each stage of design, operation, maintenance, and testing is judged against this safety integrity level.

Quantitative techniques can be used to verify whether the safety integrity level is met. ISA-dTR84.0.02 is a technical report

under development by ISA, which discusses how to apply quantitative analysis techniques to safety instrumented systems. This paper discusses two of those techniques: (1) Simplified equations and (2) Fault tree analysis.

 Free Bonus: To read the full article on ISA TR84.0.02, click here.

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