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| Criterion |  Operations Root Cause Tree Analysis |  Operations 8D Problem Solving |  Decision Making Decision Tree |  Operations Kepner-Tregoe |
|---|---|---|---|---|
Purposedifferent | 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 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. | For decisions with follow-on paths and dependencies, a linear comparison is often not enough. A Decision Tree shows how options branch under conditions and which consequences hang on each branch. | 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. |
Complexitydifferent | Medium | High | Medium | High |
Timedifferent | 1-3 h | 1-6 Wochen | 30-90 min | 2-8 h |
Participantsdifferent | 2-8 | 4-10 | 1-6 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Cause Tree, Evidence Notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Decision Tree, Option Map, Assumption List | Problem Analysis, Decision Analysis, Risk Plan |
Tagsno overlap | Root causeTreeIncidentQuality | QualityProblem solvingRoot cause | DecisionTreeOptions | Problem solvingRoot causeDecisionOperations |