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| Criterion |  Operations After-Action Review |  Operations Fault Tree Analysis |  Operations Process Mapping |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. | 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. | With a confusing workflow that has many handoffs, the method makes the actual process visible. It shows where work is passed on, delayed, or duplicated, so improvement targets the right spots. | 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 | Low | High | Medium | Medium |
Timedifferent | 20-45 min | 2-6 h | 1-3 h | 2-4 h |
Participantsdifferent | 3-12 | 3-8 | 3-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Process Map, Handoff List, Improvement Backlog | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | LearningOperationsImprovement | RiskRoot causeSafety | ProcessOperationsImprovement | Root causeSafetyIncident |