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| Criterion |  Product Discovery Fake Door Test |  UX Research User Interviews |  Product Discovery Test 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 teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | Low | Low |
Timedifferent | 1-5 Tage | 30–60 min per interview | 20-35 min |
Participantsdifferent | Nutzertraffic | 1 participant per interview | 1-5 |
Formatdifferent | Async | Workshop + async | Workshop + async |
Outputdifferent | Click Data, Interest Signal, Learning Decision | Interview Notes, Themes, Insight Summary | Test Card with a pre-set threshold |
Tags1 shared | ValidationExperimentsDemandDiscovery | QualitativeResearchCustomerDiscovery | ExperimentsValidationDiscoveryHypothesis |
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