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| Criterion |  Systems Thinking Future Reality Tree |  Operations Kepner-Tregoe |  Operations A3 Problem Solving |  Operations Change Analysis |
|---|---|---|---|---|
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. | 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. | 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 a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. |
Complexitydifferent | High | High | Medium | Medium |
Timedifferent | 2-4 h | 2-8 h | 45-90 min | 45-120 min |
Participantsdifferent | 3-8 | 2-8 | 2-5 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Problem Analysis, Decision Analysis, Risk Plan | A3 Report, Action Plan, Root Cause Analysis | Change Matrix, Cause Hypotheses, Validation Questions, Action List |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | Problem solvingRoot causeDecisionOperations | LeanProblem solvingCoachingOperations | ChangeRoot causeTroubleshootingComparison |