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| Criterion |  Innovation Lean Startup |  Architecture ARID (Active Reviews for Intermediate Designs) |  Product Discovery Test Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | For uncertain business assumptions, the method forces the idea into contact with real market reactions early. It separates wishful picture, assumption, and observable behavior, so that learning becomes faster than planning. This translates uncertainty into measurable insight. | 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. | 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 | Medium | Low | Medium |
Timedifferent | Wochen bis Monate je Lernzyklus | 2–4 h review as a planning range; preparation and evaluation additional | 20-35 min | 1-5 Tage |
Participantsdifferent | 2-8 | Designers, developers as users, and facilitation | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Hypothesis list, MVPs, Learning reports, Pivot or persevere 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 | Click Data, Interest Signal, Learning Decision |
Tags1 shared | LeanStartupValidationMVP | ArchitectureEngineeringFeedbackValidationTasks | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery |