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| Criterion |  Product Discovery Problem Interview |  Product Discovery Solution Interview |  Product Discovery Dual-Track Agile |  Product Discovery Fake Door Test |
|---|---|---|---|---|
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 uncertainty and delivery run in parallel, it separates learning work from implementation while keeping both connected. It prevents unvalidated ideas from falling directly into the delivery stream. | 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. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 30-60 min je Interview | 30-60 min je Interview | Laufend, Wochen bis Monate | 1-5 Tage |
Participantsdifferent | 5-12 Interviews | 5-10 Interviews | 4-10 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Solution Feedback, Objection List, Validation Notes | Discovery Backlog, Delivery Backlog, Experiment-Ergebnisse, Validierte Stories | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | DiscoveryInterviewsValidation | ValidationInterviewsPrototype | AgileDiscoveryDelivery | ValidationExperimentsDemandDiscovery |