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| Criterion |  Architecture ARID (Active Reviews for Intermediate Designs) |  Innovation Lean Startup |  Product Discovery Test Card |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 2–4 h review as a planning range; preparation and evaluation additional | Wochen bis Monate je Lernzyklus | 20-35 min | 25-40 min |
Participantsdifferent | Designers, developers as users, and facilitation | 2-8 | 1-5 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | Test Card with a pre-set threshold | Learning Card with evidence and next action |
Tags1 shared | ArchitectureEngineeringFeedbackValidationTasks | LeanStartupValidationMVP | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryLearning |