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| Criterion |  UX Research Usability Testing |  Product Discovery Smoke Test |  Architecture Architecture Decision Record |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | When a product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | 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. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | 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 | Medium | Low | Low | Medium |
Timedifferent | 1-2 h je Session | 1-5 Tage | 15-45 min | 1-5 Tage |
Participantsdifferent | Based on research question | Nutzertraffic | 1-3 | Nutzertraffic |
Formatdifferent | Workshop + async | Async | Async | Async |
Outputdifferent | Usability Issues, Severity List, Recommendations | Interest Metrics, Conversion Signal, Learning Note | ADR File, Decision Log, Rationale | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | ValidationUXPrototype | ValidationExperimentsDemandGrowth | ArchitectureRationaleDocumentationGovernance | ValidationExperimentsDemandDiscovery |