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| Criterion |  Engineering Fault Isolation |  Product Discovery Pretotyping |  Architecture ARID (Active Reviews for Intermediate Designs) |  Innovation Lean Startup |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | Pretotyping clarifies whether a customer problem and solution idea create enough real demand. It separates problem, assumption, solution, and evidence, and captures the result as a pretotyping sketch, test setup, and conversion data. | 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. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 30-180 min | Stunden bis wenige Tage | 2–4 h review as a planning range; preparation and evaluation additional | Wochen bis Monate je Lernzyklus |
Participantsdifferent | 1-6 | 1-4 | Designers, developers as users, and facilitation | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Pretotyping sketch, Test setup, Conversion data, Go or no-go decision | 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 |
Tagsno overlap | TroubleshootingDiagnosisEngineering | ValidationDemandMVP | ArchitectureEngineeringFeedbackValidationTasks | LeanStartupValidationMVP |