Our advice
SIL level assessment of Safety Instrumented Functions (SIF) – Essential concepts
Practical sheet REF: FIC0540 V1
Our advice
SIL level assessment of Safety Instrumented Functions (SIF) – Essential concepts

Author : Olivier IDDIR

Publication date: July 10, 2014, Review date: November 13, 2016 | Lire en français

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4. Our advice

4.1 Apply SIL recommendations as extensively as possible

To be able to justify a SIL level, IEC 61508 and 61511 define an approach that defines the actions to be implemented throughout the SIS lifecycle. The "calculatory" part, i.e. estimating the SIL level, is just one stage in a more global process that enables the SIL level selected to be justified.

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