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