stpa-step4-loss-scenarios

System safety analysis identifies loss scenarios to reveal why hazards occur by tracing causal pathways for high-priority UCAs across control loops. It provides structured scenario templates and causal factor categorization to document findings for mitigation planning.

STPA Step 4 generates loss scenarios by tracing causal pathways for unsafe control actions identified in Step 3. You need loss scenarios when investigating why specific hazards could occur in control loops and planning risk mitigation strategies.

Trace causal pathways for unsafe control actions by applying structured scenario templates to high-priority UCAs across control loops. Categorize causal factors and use recommendation matrices to systematically document why hazards occur.

Yes, you can document loss scenarios for STPA reports by generating structured documentation with scenario templates, causal factor categories, and recommendation tables ready for inclusion in system safety analyses.

Yes, you need STPA Step 3 outputs before identifying loss scenarios. The process applies to identified unsafe control actions from Step 3, tracing causal pathways for high-priority UCAs to reveal why hazards could occur.