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| Criterion |  Product Discovery Fake Door Test |  Architecture ARID (Active Reviews for Intermediate Designs) |  Product Discovery Test Card |
|---|---|---|---|
Purposedifferent | 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. | ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 1-5 Tage | 2–4 h review as a planning range; preparation and evaluation additional | 20-35 min |
Participantsdifferent | Nutzertraffic | Designers, developers as users, and facilitation | 1-5 |
Formatdifferent | Async | Workshop + async | Workshop + async |
Outputdifferent | Click Data, Interest Signal, Learning Decision | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Test Card with a pre-set threshold |
Tags1 shared | ValidationExperimentsDemandDiscovery | ArchitectureEngineeringFeedbackValidationTasks | ExperimentsValidationDiscoveryHypothesis |
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