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| Criterion |  Product Discovery Problem Interview |  Product Discovery Solution Interview |  Product Discovery Fake Door Test |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | 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 a solution idea is already on the table, it checks how it is understood and evaluated. It looks for resonance, objections, and missing fit early in the conversation. | 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 | Medium | Medium | Medium | Low |
Timedifferent | 30-60 min je Interview | 30-60 min je Interview | 1-5 Tage | 25-40 min |
Participantsdifferent | 5-12 Interviews | 5-10 Interviews | Nutzertraffic | 1-5 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Solution Feedback, Objection List, Validation Notes | Click Data, Interest Signal, Learning Decision | Learning Card with evidence and next action |
Tags1 shared | DiscoveryInterviewsValidation | ValidationInterviewsPrototype | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryLearning |