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| Criterion |  Engineering Goal Question Metric |  Product Discovery Riskiest Assumption Test |  Product Discovery Fake Door Test |  Product Discovery Assumption Mapping |
|---|---|---|---|---|
Purposedifferent | Helps clarify technical problems, hypotheses, and next steps in concrete terms. It breaks a technical problem into testable parts. The result is captured as a GQM table and metric briefs. | When an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. | 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. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 90-180 min | 1-2 Wochen pro Iteration | 1-5 Tage | 45-60 min |
Participantsdifferent | 3-6 | 2-6 | Nutzertraffic | 2-8 |
Formatdifferent | Workshop | Workshop + async | Async | Workshop + async |
Outputdifferent | GQM Table, Metric Profiles | Prioritized Assumption List, Test Plan, Results Report | Click Data, Interest Signal, Learning Decision | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | MetricsMeasurementEngineeringAlignment | ExperimentsValidationDiscoveryAssumptions | ValidationExperimentsDemandDiscovery | AssumptionsRiskExperimentsValidation |