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| Criterion |  Product Discovery Fake Door Test |  Operations 8D Problem Solving |  Product Discovery Assumption Mapping |
|---|---|---|---|
Purposedifferent | 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 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. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitydifferent | Medium | High | Medium |
Timedifferent | 1-5 Tage | 1-6 Wochen | 45-60 min |
Participantsdifferent | Nutzertraffic | 4-10 | 2-8 |
Formatdifferent | Async | Workshop + async | Workshop + async |
Outputdifferent | Click Data, Interest Signal, Learning Decision | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | ValidationExperimentsDemandDiscovery | QualityProblem solvingRoot cause | AssumptionsRiskExperimentsValidation |
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