Safety Assessment (ARP4761) Skill

Purpose

Enable structured safety assessment following ARP4761 guidelines including functional hazard assessment, fault tree analysis, and safety case development.

Capabilities

• Functional Hazard Assessment (FHA)
• Preliminary System Safety Assessment (PSSA)
• System Safety Assessment (SSA)
• Fault Tree Analysis (FTA) construction
• FMEA/FMECA development
• Common Cause Analysis (CCA)
• Particular risk analysis
• Safety case documentation

Usage Guidelines

• Conduct FHA early in development to establish safety requirements
• Develop PSSA to allocate safety requirements to system architecture
• Perform detailed FMEA and FTA for critical systems
• Identify and mitigate common cause failures
• Document safety case with clear evidence linkage
• Update safety assessment as design evolves

Dependencies

• Isograph
• ReliaSoft
• Safety assessment tools

Process Integration

• AE-022: Safety Assessment (ARP4761)
• AE-021: Certification Planning