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| Criterion |  Operations A3 Problem Solving |  DevOps Blameless Postmortem |  Delivery Value Stream Mapping |  Operations After-Action Review |
|---|---|---|---|---|
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. | 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. | When delivery work dissolves into wait times, handoffs, and hidden effort, Value Stream Mapping makes the actual flow visible. The method exposes bottlenecks, idle time, and feedback loops so lead time and improvement levers become tangible. | 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 | 45-90 min | 30-90 min | 1-3 h | 20-45 min |
Participantsdifferent | 2-5 | 3-12 | 4-10 | 3-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Postmortem Doc, Action Items, Timeline | Current-state map, Future-state map, Bottleneck list | Lessons learned, Action items, Event summary |
Tagsno overlap | LeanProblem solvingCoachingOperations | Site Reliability EngineeringIncidentLearningReliability | LeanFlowWasteDelivery | LearningOperationsImprovement |