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| Criterion |  UX Research Card Sorting |  Product Discovery Solution Interview |  Product Discovery Smoke Test |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | 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 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 only needs to be roughly verified, it tests interest with minimal effort. It measures whether people would take a next step at all. | 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. |
Complexitydifferent | Low | Medium | Low | Medium |
Timedifferent | 20-45 min | 30-60 min je Interview | 1-5 Tage | 1-5 Tage |
Participantsdifferent | Based on research question | 5-10 Interviews | Nutzertraffic | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Async | Async |
Outputdifferent | Content groups, Label set, IA hypotheses | Solution Feedback, Objection List, Validation Notes | Interest Metrics, Conversion Signal, Learning Note | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | Information architectureNavigationStructure | ValidationInterviewsPrototype | ValidationExperimentsDemandGrowth | ValidationExperimentsDemandDiscovery |