sil-calculator

# SIL Calculator Skill ## Purpose The SIL Calculator Skill determines Safety Integrity Levels for Safety Instrumented Functions and verifies SIF designs meet required risk reduction per IEC 61511. ## Capabilities - SIL determination (risk graph, LOPA, risk matrix) - PFDavg calculations - Proof test interval optimization - Common cause failure analysis - Hardware fault tolerance verification - Diagnostic coverage assessment - Systematic capability evaluation - SIF verification calculations ## Usage Guidelines ### When to Use - Determining SIL requirements - Designing safety instrumented functions - Verifying SIF performance - Optimizing proof test intervals ### Prerequisites - HAZOP recommendations available - Risk criteria defined - Component failure data available - Architecture selected ### Best Practices - Use consistent methodology - Document all assumptions - Consider common cause failures - Verify systematic capability ## Process Integration This skill integrates with: - Safety Instrumented System Design - HAZOP Study Facilitation - Pressure Relief System Design ## Configuration ```yaml sil-calculator: determination-methods: - risk-graph - lopa - risk-matrix failure-databases: - OREDA - SINTEF - exida ``` ## Output Artifacts - SIL determination reports - PFDavg calculations - SIF specifications - Verification reports - Test interval recommendations