a5c-ai 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
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