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| Criterion |  Operations Barrier Analysis |  Operations Family Tree Analysis |  Operations A3 Problem Solving |  Operations Root Cause 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. | 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 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 2-4 h | 2-4 h | 45-90 min | 1-4 h |
Participantsdifferent | 2-6 | 2-6 | 2-5 | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Family Tree Diagram, Pattern Notes, Systemic Measures | A3 Report, Action Plan, Root Cause Analysis | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | Root causeSafetyIncident | Root causePatternsIncidentSystemic | LeanProblem solvingCoachingOperations | Root causeProblem solvingQualityIncident |