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| Criterion |  Systems Thinking Future Reality Tree |  Operations Root Cause Analysis |  Operations A3 Problem Solving |
|---|---|---|---|
Purposedifferent | A Future Reality Tree shows how desired actions are meant to lead to a better system state. The method checks whether a path of change holds together logically before time flows into implementation. | 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 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 | High | Medium | Medium |
Timedifferent | 2-4 h | 1-4 h | 45-90 min |
Participantsdifferent | 3-8 | 3-8 | 2-5 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | Root causeProblem solvingQualityIncident | LeanProblem solvingCoachingOperations |
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