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| Criterion |  Systems Thinking Future Reality Tree |  Operations Failure Mode and Effects Analysis |  Operations Root Cause Tree 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 process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | 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. |
Complexitydifferent | High | High | Medium |
Timedifferent | 2-4 h | 2-6 h | 1-3 h |
Participantsdifferent | 3-8 | 3-10 | 2-8 |
Formatsame | Workshop | Workshop | Workshop |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | FMEA Table, Risk Priority, Mitigation Actions | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | RiskQualityOperationsRoot cause | Root causeTreeIncidentQuality |
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