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| Criterion |  Operations A3 Problem Solving |  Operations Getting Things Done |  Innovation Lean Startup |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | With many open commitments and ideas in daily life, a reliable external storage system emerges. The method relieves the mind so priority and context don't have to compete in memory. | 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 single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 45-90 min | 1-2 h Setup, laufend | Wochen bis Monate je Lernzyklus | 15-30 min |
Participantsdifferent | 2-5 | 1 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Action Lists, Project List, Review Routine | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | Root cause notes, Countermeasures |
Tagsno overlap | LeanProblem solvingCoachingOperations | ProductivityPlanningTasksExecution | LeanStartupValidationMVP | Root causeIncidentLeanProblem solving |