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| Criterion |  Operations Fault Tree Analysis |  Facilitation Lean Coffee |  Operations Family Tree Analysis |
|---|---|---|---|
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. | When a group without a fixed agenda needs to get into useful conversations quickly, Lean Coffee structures the start around interests rather than a presentation. The group itself negotiates which topics get time first and which wait. | 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 | High | Low | Medium |
Timedifferent | 2-6 h | 30-90 min | 2-4 h |
Participantsdifferent | 3-8 | 3-20 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Prioritized Topics, Discussion Notes, Action Items | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | RiskRoot causeSafety | FacilitationAutonomyDialogue | Root causePatternsIncidentSystemic |
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