/fmea-risk-analysis

name: fmea-risk-analysis
description: "Enumerate failure modes, trace cause-mode-effect chains, score risk, design mitigations, and re-evaluate residual risk."

fmea-risk-analysis

Purpose

Enumerate failure modes, trace cause-mode-effect chains, score risk, design mitigations, and re-evaluate residual risk.

Input contract

required: [system_or_process, functions, operating_conditions]
optional: [failure_history, severity_scale, occurrence_scale, detectability_scale]
constraints: [scales and scoring direction must be declared]

Execution protocol

Do not perform called SOP operations inline; each loaded SOP owns its contract and thresholds.

1. You MUST load skill `enumerate-failure-modes` to enumerate failure modes. You MUST load skill `build-failure-chain` to construct their propagation chains. 2. You MUST load skill `score-fmea-risk` to score severity, occurrence, detectability, and priority. 3. You MUST load skill `design-mitigation` to design mitigations. You MUST load skill `validate-mitigation-effect` to re-run the relevant test and validate the effect. If a failure chain requires explicit intervention counterfactuals, consider `counterfactual-causal-analysis` as the next tactic. Deviation: omit an unavailable score dimension only with an explicit unknown and no hidden imputation.

Output contract

produces: [failure_mode_register, failure_chains, risk_scores, mitigation_plan, residual_risk_report]
delta_fields: [findings, evidence_updates, uncertainties, decisions, open_questions]

Thresholds and quality gates

• Risk scores must preserve severity, occurrence, detectability, scale definitions, and rationale.
• A mitigation passes only when re-testing demonstrates reduced risk without unacceptable new failure modes.

Failure and counterexamples

Do not rank a failure mode without a cause/effect chain. Mark residual risk unknown when mitigation was not re-tested.

Provenance map

• resolved: failure-anticipation
• resolved: design-fmea
• resolved: process-fmea
• resolved: risk-prioritization
• resolved: mitigation-design
• resolved: failure-chain-tracing
• resolved: mitigation-validation

Preserved source criteria ledger

| source | source line | kind | source criterion | |---|---:|---|---| | v4 architecture | node desc | textual | Enumerate failure modes, score risk, mitigate, and re-evaluate residual risk. |

Context checkpoint / Delta notes

Append failure modes, chains, scores, mitigations, retest evidence, and residual uncertainties.