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| Criterion |  Systems Thinking Future Reality Tree |  Operations Barrier Analysis |  Operations A3 Problem Solving |  Operations Kepner-Tregoe |
|---|---|---|---|---|
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 risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | 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 disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. |
Complexitydifferent | High | Medium | Medium | High |
Timedifferent | 2-4 h | 2-4 h | 45-90 min | 2-8 h |
Participantsdifferent | 3-8 | 2-6 | 2-5 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | A3 Report, Action Plan, Root Cause Analysis | Problem Analysis, Decision Analysis, Risk Plan |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | Root causeSafetyIncident | LeanProblem solvingCoachingOperations | Problem solvingRoot causeDecisionOperations |