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| Criterion |  Decision Making Wideband Delphi |  Growth A/B Testing |  Product Discovery Fake Door Test |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | A single opinion rarely holds up for planning when the future is genuinely uncertain. It separates options, evaluation criteria, and open risks. The result is captured as an Estimate Range, Assumption Log, and Expert Consensus Notes. | 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. | 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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | High | High | Medium | Low |
Timedifferent | 1-4 h or multiple rounds | 1-4 Wochen | 1-5 Tage | 25-40 min |
Participantsdifferent | 4-12 Experten | 1-6 | Nutzertraffic | 1-5 |
Formatdifferent | Workshop + async | Async | Async | Workshop + async |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Experiment results, Decision log, Learning summary | Click Data, Interest Signal, Learning Decision | Learning Card with evidence and next action |
Tagsno overlap | EstimationExpertsForecasting | ExperimentsGrowthAnalyticsValidation | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryLearning |