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| Criterion |  Architecture Request for Comments |  Product Discovery Test Card |  Product Discovery Fake Door Test |
|---|---|---|---|
Purposedifferent | An RFC clarifies architecture context, options, and consequences. It structures technical context, alternatives, tradeoffs, open questions, and review feedback, and captures the result as an RFC document, reviewer comments, and a decision rationale. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | 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 | Medium |
Timedifferent | 1-3 Wochen vom Draft bis zur Entscheidung | 20-35 min | 1-5 Tage |
Participantsdifferent | 3-20 Reviewer | 1-5 | Nutzertraffic |
Formatdifferent | Async | Workshop + async | Async |
Outputdifferent | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | ArchitectureDecisionAsyncGovernance | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery |
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