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| Criterion |  Decision Making Wideband Delphi |  Product Discovery Learning Card |  Product Discovery Riskiest Assumption Test |  Product Discovery Fake Door Test |
|---|---|---|---|---|
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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | 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. |
Complexitydifferent | High | Low | Medium | Medium |
Timedifferent | 1-4 h or multiple rounds | 25-40 min | 1-2 Wochen pro Iteration | 1-5 Tage |
Participantsdifferent | 4-12 Experten | 1-5 | 2-6 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Learning Card with evidence and next action | Prioritized Assumption List, Test Plan, Results Report | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | EstimationExpertsForecasting | ExperimentsValidationDiscoveryLearning | ExperimentsValidationDiscoveryAssumptions | ValidationExperimentsDemandDiscovery |