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| Criterion |  Operations Fault Tree Analysis |  Systems Thinking Iceberg Model |  Operations Barrier Analysis |  Systems Thinking Behavior Over Time Graph |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | 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 Behavior Over Time Graph shows how a metric or observation develops over time. The method makes trends, breaks, and recurring patterns visible that get lost in snapshots. |
Complexitydifferent | High | Low | Medium | Low |
Timedifferent | 2-6 h | 30-60 min | 2-4 h | 20-45 min |
Participantsdifferent | 3-8 | 2-10 | 2-6 | 1-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Behavior Over Time Graph, Trend Hypotheses, Key Events |
Tagsno overlap | RiskRoot causeSafety | Systems thinkingRoot causePatterns | Root causeSafetyIncident | Systems thinkingPatternsDynamics |