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| Criterion |  Operations A3 Problem Solving |  Operations Fault Tree Analysis |  Operations Family Tree Analysis |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. | 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. | 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 | Medium | High | Medium | Medium |
Timedifferent | 45-90 min | 2-6 h | 2-4 h | 2-4 h |
Participantsdifferent | 2-5 | 3-8 | 2-6 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Family Tree Diagram, Pattern Notes, Systemic Measures | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | LeanProblem solvingCoachingOperations | RiskRoot causeSafety | Root causePatternsIncidentSystemic | Root causeSafetyIncident |