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| Criterion |  Operations Fishbone Diagram |  Product Discovery Fake Door Test |  Operations Failure Mode and Effects Analysis |  Product Discovery Learning Card |
|---|---|---|---|---|
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. | When demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small. | 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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Low | Medium | High | Low |
Timedifferent | 30-60 min | 1-5 Tage | 2-6 h | 25-40 min |
Participantsdifferent | 2-8 | Nutzertraffic | 3-10 | 1-5 |
Formatdifferent | Workshop | Async | Workshop | Workshop + async |
Outputdifferent | Fishbone Diagram, Cause Categories, Investigation Backlog | Click Data, Interest Signal, Learning Decision | FMEA Table, Risk Priority, Mitigation Actions | Learning Card with evidence and next action |
Tagsno overlap | Root causeQualityOperations | ValidationExperimentsDemandDiscovery | RiskQualityOperationsRoot cause | ExperimentsValidationDiscoveryLearning |