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| Criterion |  Systems Thinking Future Reality Tree |  Operations Causal Factor Analysis |  Systems Thinking Leverage Points |  Operations Barrier 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 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. | Leverage Points show exactly where interventions in a system produce a disproportionate effect. It draws relationships, patterns, and feedback loops. The result is captured as a leverage map and action strategy. | 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. |
Complexitydifferent | High | High | High | Medium |
Timedifferent | 2-4 h | 2-6 h | Half day | 2-4 h |
Participantsdifferent | 3-8 | 3-10 | 3-12 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Leverage Map, Action Strategy | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | CausalityIncidentRoot causeTimeline | Systems thinkingChangeStrategy | Root causeSafetyIncident |