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What is PFDavg ?

SIS PFD - Safety Instrumented System

SIS PFD – Safety Instrumented System

The probability of Failure on Demand (PFD) calculation is carried out as part of the Safety Instrumented System (SIS) design after the LOPA/PHA study.

Functional Safety Exam Questions & Answers

Functional Safety Questions & Answers

Functional Safety Questions & Answers : SIS as an “instrumented system used to implement one or more safety instrumented functions.

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