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Selected:After-Action ReviewATAM (Architecture Tradeoff Analysis Method)Blameless PostmortemFailure Mode and Effects Analysis
| Criterion |  Operations After-Action Review |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  DevOps Blameless Postmortem |  Operations Failure Mode and Effects 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. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. | 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. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Low | High | Medium | High |
Timedifferent | 20-45 min | Several meetings plus preparation and analysis; total effort depends on scope | 30-90 min | 2-6 h |
Participantsdifferent | 3-12 | Evaluation team, architects, and relevant stakeholders | 3-12 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Lessons learned, Action items, Event summary | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Postmortem Doc, Action Items, Timeline | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | LearningOperationsImprovement | ArchitectureQualityRiskTradeoffsStakeholders | Site Reliability EngineeringIncidentLearningReliability | RiskQualityOperationsRoot cause |