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| Criterion |  Decision Making Wideband Delphi |  Product Discovery Fake Door Test |  Product Discovery Smoke 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 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 demand only needs to be roughly verified, it tests interest with minimal effort. It measures whether people would take a next step at all. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | High | Medium | Low | Low |
Timedifferent | 1-4 h or multiple rounds | 1-5 Tage | 1-5 Tage | 25-40 min |
Participantsdifferent | 4-12 Experten | Nutzertraffic | Nutzertraffic | 1-5 |
Formatdifferent | Workshop + async | Async | Async | Workshop + async |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Click Data, Interest Signal, Learning Decision | Interest Metrics, Conversion Signal, Learning Note | Learning Card with evidence and next action |
Tagsno overlap | EstimationExpertsForecasting | ValidationExperimentsDemandDiscovery | ValidationExperimentsDemandGrowth | ExperimentsValidationDiscoveryLearning |