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| Criterion |  DevOps Game Day |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  DevOps Blameless Postmortem |
|---|---|---|---|
Purposedifferent | In preparing for rare incidents, the method tests response capability under controlled conditions. It shows where assumptions about stability, roles, and recovery are too optimistic. | 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. |
Complexitydifferent | High | High | Medium |
Timedifferent | Halber Tag | Several meetings plus preparation and analysis; total effort depends on scope | 30-90 min |
Participantsdifferent | 5-20 | Evaluation team, architects, and relevant stakeholders | 3-12 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Simulation Notes, Gaps List, Updated Runbooks | 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 |
Tagsno overlap | ResilienceOperationsIncident | ArchitectureQualityRiskTradeoffsStakeholders | Site Reliability EngineeringIncidentLearningReliability |
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