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| Criterion |  Operations 5 Whys |  Operations 8D Problem Solving |  Business Strategy Value Chain Analysis |
|---|---|---|---|
Purposedifferent | 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 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. | Value Chain Analysis shows where value is created, costs accrue, and differentiation becomes possible along the process. It compares strengths, risks, market logic, and courses of action. The result is captured as a value-chain map and lever list. |
Complexitydifferent | Low | High | High |
Timedifferent | 15-30 min | 1-6 Wochen | Half day |
Participantsdifferent | 2-6 | 4-10 | 3-8 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Value Chain Map, Lever List |
Tagsno overlap | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause | StrategyBusiness modelDiagnosisAnalysis |
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