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| Criterion |  Operations Fishbone Diagram |  Operations Root Cause Tree Analysis |  Growth A/B Testing |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | 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 problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. | 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. |
Complexitydifferent | Low | Medium | High | High |
Timedifferent | 30-60 min | 1-3 h | 1-4 Wochen | 2-6 h |
Participantsdifferent | 2-8 | 2-8 | 1-6 | 3-10 |
Formatdifferent | Workshop | Workshop | Async | Workshop |
Outputdifferent | Fishbone Diagram, Cause Categories, Investigation Backlog | Cause Tree, Evidence Notes, Countermeasures | Experiment results, Decision log, Learning summary | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | Root causeQualityOperations | Root causeTreeIncidentQuality | ExperimentsGrowthAnalyticsValidation | RiskQualityOperationsRoot cause |