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| Criterion |  Engineering Failure Scenario Analysis |  Operations Fishbone Diagram |  Operations 5 Whys |
|---|---|---|---|
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. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | 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. |
Complexitydifferent | Medium | Low | Low |
Timedifferent | 1-3 h | 30-60 min | 15-30 min |
Participantsdifferent | 3-8 | 2-8 | 2-6 |
Formatsame | Workshop | Workshop | Workshop |
Outputdifferent | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | Fishbone Diagram, Cause Categories, Investigation Backlog | Root cause notes, Countermeasures |
Tagsno overlap | FailureResilienceRisk | Root causeQualityOperations | Root causeIncidentLeanProblem solving |
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