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| Criterion |  Product Discovery Assumption Mapping |  Engineering Fault Isolation |  Growth A/B Testing |  Architecture ARID (Active Reviews for Intermediate Designs) |
|---|---|---|---|---|
Purposedifferent | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. | 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. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. | 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. |
Complexitydifferent | Medium | Medium | High | Medium |
Timedifferent | 45-60 min | 30-180 min | 1-4 Wochen | 2–4 h review as a planning range; preparation and evaluation additional |
Participantsdifferent | 2-8 | 1-6 | 1-6 | Designers, developers as users, and facilitation |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Assumption map, Test backlog, Risk ranking | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Experiment results, Decision log, Learning summary | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions |
Tagsno overlap | AssumptionsRiskExperimentsValidation | TroubleshootingDiagnosisEngineering | ExperimentsGrowthAnalyticsValidation | ArchitectureEngineeringFeedbackValidationTasks |