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| Criterion |  Engineering Fault Isolation |  DevOps Incident Command |  DevOps Blameless Postmortem |  Operations After-Action Review |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | During an acute incident with several people involved, the method creates a clear leadership and communication structure. It reduces chaos when fast coordination and clean situational awareness are both needed at once. | 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 | Medium | Low |
Timedifferent | 30-180 min | As needed | 30-90 min | 20-45 min |
Participantsdifferent | 1-6 | 4-15 | 3-12 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Incident Log, Action Tracker, Stakeholder Updates | Postmortem Doc, Action Items, Timeline | Lessons learned, Action items, Event summary |
Tagsno overlap | TroubleshootingDiagnosisEngineering | IncidentOperationsReliability | Site Reliability EngineeringIncidentLearningReliability | LearningOperationsImprovement |