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| Criterion |  Systems Thinking Future Reality Tree |  Operations Causal Factor Analysis |  Operations 8D 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. | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | 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. |
Complexitysame | High | High | High |
Timedifferent | 2-4 h | 2-6 h | 1-6 Wochen |
Participantsdifferent | 3-8 | 3-10 | 4-10 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | CausalityIncidentRoot causeTimeline | QualityProblem solvingRoot cause |
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