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| Criterion |  Innovation Lean Startup |  Operations 5 Whys |  Operations Root Cause Tree Analysis |  Operations A3 Problem Solving |
|---|---|---|---|---|
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 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. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | 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. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | Wochen bis Monate je Lernzyklus | 15-30 min | 1-3 h | 45-90 min |
Participantsdifferent | 2-8 | 2-6 | 2-8 | 2-5 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | Root cause notes, Countermeasures | Cause Tree, Evidence Notes, Countermeasures | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | LeanStartupValidationMVP | Root causeIncidentLeanProblem solving | Root causeTreeIncidentQuality | LeanProblem solvingCoachingOperations |