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| Criterion |  Operations Kaizen Event |  Architecture ARID (Active Reviews for Intermediate Designs) |  Growth A/B Testing |  Product Discovery Assumption Mapping |
|---|---|---|---|---|
Purposedifferent | For a tightly scoped process segment with noticeable waste, the method bundles shared energy for change. It suits situations that call for fast learning loops and visible adjustments. | 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 assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitydifferent | Medium | Medium | High | Medium |
Timedifferent | 0.5-5 Tage | 2–4 h review as a planning range; preparation and evaluation additional | 1-4 Wochen | 45-60 min |
Participantsdifferent | 4-10 | Designers, developers as users, and facilitation | 1-6 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Async | Workshop + async |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Experiment results, Decision log, Learning summary | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | LeanContinuous improvementOperations | ArchitectureEngineeringFeedbackValidationTasks | ExperimentsGrowthAnalyticsValidation | AssumptionsRiskExperimentsValidation |