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Selected:ARID (Active Reviews for Intermediate Designs)Lean StartupHypothesis-Driven TroubleshootingA3 Problem Solving
| Criterion |  Architecture ARID (Active Reviews for Intermediate Designs) |  Innovation Lean Startup |  Engineering Hypothesis-Driven Troubleshooting |  Operations A3 Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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. | When systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. | 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. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 2–4 h review as a planning range; preparation and evaluation additional | Wochen bis Monate je Lernzyklus | 30-240 min | 45-90 min |
Participantsdifferent | Designers, developers as users, and facilitation | 2-8 | 1-6 | 2-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | 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 | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | ArchitectureEngineeringFeedbackValidationTasks | LeanStartupValidationMVP | TroubleshootingProblem solvingDiagnosis | LeanProblem solvingCoachingOperations |