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| Criterion |  Product Discovery Fake Door Test |  Product Discovery Problem Interview |  Product Discovery Smoke Test |  Product Discovery Learning Card |
|---|---|---|---|---|
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. | When the picture of the problem still needs to become solid, it asks about real situations and consequences. It separates genuine suffering from mere interest in a solution. | 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 | Medium | Medium | Low | Low |
Timedifferent | 1-5 Tage | 30-60 min je Interview | 1-5 Tage | 25-40 min |
Participantsdifferent | Nutzertraffic | 5-12 Interviews | Nutzertraffic | 1-5 |
Formatdifferent | Async | Workshop + async | Async | Workshop + async |
Outputdifferent | Click Data, Interest Signal, Learning Decision | Problem Evidence, Risk Notes, Customer Segments | Interest Metrics, Conversion Signal, Learning Note | Learning Card with evidence and next action |
Tags1 shared | ValidationExperimentsDemandDiscovery | DiscoveryInterviewsValidation | ValidationExperimentsDemandGrowth | ExperimentsValidationDiscoveryLearning |