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| Criterion |  Operations Barrier Analysis |  Operations Causal Factor Analysis |  Operations Fault Tree Analysis |  Systems Thinking Current Reality Tree |
|---|---|---|---|---|
Purposedifferent | 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 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 a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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. |
Complexitydifferent | Medium | High | High | High |
Timedifferent | 2-4 h | 2-6 h | 2-6 h | 2-6 h |
Participantsdifferent | 2-6 | 3-10 | 3-8 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Current Reality Tree, Core Problems, Intervention Ideas |
Tags1 shared | Root causeSafetyIncident | CausalityIncidentRoot causeTimeline | RiskRoot causeSafety | Systems thinkingRoot causeConstraintsCausality |