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| Criterion |  Architecture Architecture Decision Record |  Product Discovery Fake Door Test |  Product Discovery Learning Card |
|---|---|---|---|
Purposedifferent | 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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Low | Medium | Low |
Timedifferent | 15-45 min | 1-5 Tage | 25-40 min |
Participantsdifferent | 1-3 | Nutzertraffic | 1-5 |
Formatdifferent | Async | Async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Click Data, Interest Signal, Learning Decision | Learning Card with evidence and next action |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryLearning |
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