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Selected:Blameless PostmortemATAM (Architecture Tradeoff Analysis Method)Software Architecture CanvasRisk Storming
| Criterion |  DevOps Blameless Postmortem |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Architecture Software Architecture Canvas |  Architecture Risk Storming |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | The Software Architecture Canvas reduces a system to the most important architecture decisions, constraints, and interfaces. It is useful when teams need a resilient overall picture quickly. | Helps clarify architecture context, options, and consequences in concrete terms. It organizes technical context, alternatives, and consequences. The result is captured as an Annotated Diagram, a Prioritized Risk List, and an Action Backlog. |
Complexitydifferent | Medium | High | Low | Low |
Timedifferent | 30-90 min | Several meetings plus preparation and analysis; total effort depends on scope | 1-2 h | 60-90 min |
Participantsdifferent | 3-12 | Evaluation team, architects, and relevant stakeholders | 3-10 | 4-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Architecture Canvas, Goals, Constraints, Quality Attributes | Annotated Diagram, Prioritized Risk List, Action Backlog |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | ArchitectureQualityRiskTradeoffsStakeholders | CanvasArchitectureAlignmentWorkshop | RiskArchitectureWorkshopValidation |