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| Criterion |  Architecture ARID (Active Reviews for Intermediate Designs) |  Product Discovery Concierge MVP |  Product Discovery Learning Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
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. | When an idea can first fail or grow through genuine hands-on support, it relies on manual work instead of automation. It shows whether user value holds up even under manual execution. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | 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 | 2–4 h review as a planning range; preparation and evaluation additional | 1-4 Wochen | 25-40 min | 1-5 Tage |
Participantsdifferent | Designers, developers as users, and facilitation | 3-10 Kunden | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Concierge Learnings, Service Blueprint, MVP Risks | Learning Card with evidence and next action | Click Data, Interest Signal, Learning Decision |
Tags1 shared | ArchitectureEngineeringFeedbackValidationTasks | MVPValidationServiceDiscovery | ExperimentsValidationDiscoveryLearning | ValidationExperimentsDemandDiscovery |