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Safety Integrity Level (SIL) Assessment Workflow

This workflow provides the basic, high-level steps for performing a Safety Integrity Level (SIL) assessment. The steps and links in this workflow do not necessarily reference every possible procedure. For more procedures, see the links in the Related Information section.

Performing an SIL assessment includes the following steps:

1. Assess the required SIL value for an Instrumented Function by creating the following SIL Assessment records:

   • Layer of Protection Analysis (LOPA)
   • Risk Matrix
   • Process Hazards Analysis (PHA)
   • External

   Note: You can create only one Risk Matrix and PHA SIL Assessment records for an Instrumented Function.

2. Associate the appropriate SIL Assessment with the Instrumented Function.

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