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| Criterion |  Innovation Lean Startup |  Engineering Fault Isolation |  Operations Root Cause Analysis |  Operations 8D 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. | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. |
Complexitydifferent | Medium | Medium | Medium | High |
Timedifferent | Wochen bis Monate je Lernzyklus | 30-180 min | 1-4 h | 1-6 Wochen |
Participantsdifferent | 2-8 | 1-6 | 3-8 | 4-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | LeanStartupValidationMVP | TroubleshootingDiagnosisEngineering | Root causeProblem solvingQualityIncident | QualityProblem solvingRoot cause |