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| Criterion |  Operations Failure Mode and Effects Analysis |  Engineering Hypothesis-Driven Troubleshooting |  Operations Fishbone Diagram |
|---|---|---|---|
Purposedifferent | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | When systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. | 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. |
Complexitydifferent | High | Medium | Low |
Timedifferent | 2-6 h | 30-240 min | 30-60 min |
Participantsdifferent | 3-10 | 1-6 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | FMEA Table, Risk Priority, Mitigation Actions | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | RiskQualityOperationsRoot cause | TroubleshootingProblem solvingDiagnosis | Root causeQualityOperations |
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