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| Criterion |  Operations Gemba Walk |  Architecture ARID (Active Reviews for Intermediate Designs) |  Growth A/B Testing |  Product Discovery Experiment Canvas |
|---|---|---|---|---|
Purposedifferent | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | 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 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. | When experiments become unreadable after the fact, it arranges hypothesis, signal, and learning goal on a single canvas. It separates problem, assumption, solution, and evidence. The result is captured as a Completed Experiment Canvas and a Success Metric. |
Complexitydifferent | Low | Medium | High | Low |
Timedifferent | 30-120 min | 2–4 h review as a planning range; preparation and evaluation additional | 1-4 Wochen | 30-60 min |
Participantsdifferent | 2-6 | Designers, developers as users, and facilitation | 1-6 | 1-5 |
Formatdifferent | Workshop | Workshop + async | Async | Workshop + async |
Outputdifferent | Observation Notes, Improvement Ideas | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Experiment results, Decision log, Learning summary | Completed Experiment Canvas, Success Metric |
Tagsno overlap | LeanObservationProcessOperations | ArchitectureEngineeringFeedbackValidationTasks | ExperimentsGrowthAnalyticsValidation | ExperimentsValidationDiscoveryHypothesis |