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| Criterion |  Operations Causal Factor Analysis |  Systems Thinking Iceberg Model |  Systems Thinking Current Reality Tree |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | 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. | The Iceberg Model separates visible events from patterns, structures, and mental models. This turns a single observation into a deeper understanding of why a problem keeps recurring. | 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. | 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 | Low | High | Medium |
Timedifferent | 2-6 h | 30-60 min | 2-6 h | 2-4 h |
Participantsdifferent | 3-10 | 2-10 | 3-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Current Reality Tree, Core Problems, Intervention Ideas | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tags1 shared | CausalityIncidentRoot causeTimeline | Systems thinkingRoot causePatterns | Systems thinkingRoot causeConstraintsCausality | Root causeSafetyIncident |