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| Criterion |  Engineering Failure Scenario Analysis |  Operations 5 Whys |  Operations Fault Tree Analysis |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. |
Complexitydifferent | Medium | Low | High | High |
Timedifferent | 1-3 h | 15-30 min | 2-6 h | 1-6 Wochen |
Participantsdifferent | 3-8 | 2-6 | 3-8 | 4-10 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | Root cause notes, Countermeasures | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | FailureResilienceRisk | Root causeIncidentLeanProblem solving | RiskRoot causeSafety | QualityProblem solvingRoot cause |