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Selected:Lean StartupA3 Problem SolvingArchitecture Decision RecordARID (Active Reviews for Intermediate Designs)
| Criterion |  Innovation Lean Startup |  Operations A3 Problem Solving |  Architecture Architecture Decision Record |  Architecture ARID (Active Reviews for Intermediate Designs) |
|---|---|---|---|---|
Purposedifferent | 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. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | 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 | Low | Medium |
Timedifferent | Wochen bis Monate je Lernzyklus | 45-90 min | 15-45 min | 2–4 h review as a planning range; preparation and evaluation additional |
Participantsdifferent | 2-8 | 2-5 | 1-3 | Designers, developers as users, and facilitation |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | A3 Report, Action Plan, Root Cause Analysis | ADR File, Decision Log, Rationale | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions |
Tagsno overlap | LeanStartupValidationMVP | LeanProblem solvingCoachingOperations | ArchitectureRationaleDocumentationGovernance | ArchitectureEngineeringFeedbackValidationTasks |