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| Criterion |  Operations Kepner-Tregoe |  Business Strategy Value Chain Analysis |  Operations A3 Problem Solving |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | 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. | 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. | 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 | High | High | Medium | High |
Timedifferent | 2-8 h | Half day | 45-90 min | 1-6 Wochen |
Participantsdifferent | 2-8 | 3-8 | 2-5 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Problem Analysis, Decision Analysis, Risk Plan | Value Chain Map, Lever List | A3 Report, Action Plan, Root Cause Analysis | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | Problem solvingRoot causeDecisionOperations | StrategyBusiness modelDiagnosisAnalysis | LeanProblem solvingCoachingOperations | QualityProblem solvingRoot cause |