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| Criterion |  Operations Barrier Analysis |  Systems Thinking Iceberg Model |  Systems Thinking Current Reality Tree |  Operations Family Tree Analysis |
|---|---|---|---|---|
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. | 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 series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. |
Complexitydifferent | Medium | Low | High | Medium |
Timedifferent | 2-4 h | 30-60 min | 2-6 h | 2-4 h |
Participantsdifferent | 2-6 | 2-10 | 3-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Current Reality Tree, Core Problems, Intervention Ideas | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tags1 shared | Root causeSafetyIncident | Systems thinkingRoot causePatterns | Systems thinkingRoot causeConstraintsCausality | Root causePatternsIncidentSystemic |