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| Criterion |  Operations Barrier Analysis |  DevOps Blameless Postmortem |  Operations After-Action Review |
|---|---|---|---|
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. | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | 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. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 2-4 h | 30-90 min | 20-45 min |
Participantsdifferent | 2-6 | 3-12 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Postmortem Doc, Action Items, Timeline | Lessons learned, Action items, Event summary |
Tagsno overlap | Root causeSafetyIncident | Site Reliability EngineeringIncidentLearningReliability | LearningOperationsImprovement |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
