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| Criterion |  Product Discovery Problem Interview |  UX Research Card Sorting |  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 content only makes sense internally and users can't find the structure again, card sorting exposes their mental order. Terms, groups, and naming are then aligned with the target group's expectations. | 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 | Low | Medium | Low |
Timedifferent | 30-60 min je Interview | 20-45 min | 1-5 Tage | 25-40 min |
Participantsdifferent | 5-12 Interviews | Based on research question | Nutzertraffic | 1-5 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Content groups, Label set, IA hypotheses | Click Data, Interest Signal, Learning Decision | Learning Card with evidence and next action |
Tagsno overlap | DiscoveryInterviewsValidation | Information architectureNavigationStructure | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryLearning |