The Safety Integrity Level (SIL) is based on the value of risk reduction associated with a Safety Instrumented Function (SIF) protecting against a specific hazardous event, or how the risk has to be reduced to reach an acceptable level.
The determination of a SIL is based on quantitative and qualitative factors such as:
development process
safety life cycle management
Find out more on Safety Integrity Levels, the need for SIL 3, its determination and costs and much more: download the guide here
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