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| Criterion |  Engineering Fault Isolation |  Engineering Failure Scenario Analysis |  Engineering Hypothesis-Driven Troubleshooting |  Decision Making Pre-Mortem |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | In critical processes, it is not enough to plan only for the normal case. Failure Scenario Analysis looks at the path into failure and shows which failures, chains, and control gaps cause the most damage. | When systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. | In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 30-180 min | 1-3 h | 30-240 min | 20–45 min |
Participantsdifferent | 1-6 | 3-8 | 1-6 | Small cross-functional group |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | Risk list, Mitigation plan, Assumption log |
Tagsno overlap | TroubleshootingDiagnosisEngineering | FailureResilienceRisk | TroubleshootingProblem solvingDiagnosis | RiskDecisionFailurePlanning |