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| Criterion |  Operations Barrier Analysis |  Systems Thinking Current Reality Tree |  Systems Thinking Iceberg Model |
|---|---|---|---|
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. | 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. | 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. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 2-4 h | 2-6 h | 30-60 min |
Participantsdifferent | 2-6 | 3-8 | 2-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Current Reality Tree, Core Problems, Intervention Ideas | Iceberg Worksheet, Pattern Notes, Intervention Ideas |
Tags1 shared | Root causeSafetyIncident | Systems thinkingRoot causeConstraintsCausality | Systems thinkingRoot causePatterns |
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