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| Criterion |  Systems Thinking Current Reality Tree |  Systems Thinking Future Reality Tree |  Operations Barrier Analysis |  Operations MORT Analysis |
|---|---|---|---|---|
Purposedifferent | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | 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 safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. |
Complexitydifferent | High | High | Medium | High |
Timedifferent | 2-6 h | 2-4 h | 2-4 h | Mehrere Tage bis Wochen |
Participantsdifferent | 3-8 | 3-8 | 2-6 | 2-6 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Current Reality Tree, Core Problems, Intervention Ideas | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations |
Tagsno overlap | Systems thinkingRoot causeConstraintsCausality | Theory of ConstraintsSystems thinkingChange | Root causeSafetyIncident | Root causeSafetySystemicIncident |