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| Criterion |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Decision Making Risk Matrix |  Decision Making Red Teaming |  Decision Making Assumption Surfacing |
|---|---|---|---|---|
Purposedifferent | 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. | When a project faces many possible disruptions, it quickly becomes unclear which risks deserve attention first. It separates options, evaluation criteria, and open risks. The result is captured as a Risk Matrix and a Top Risk List. | For strategic decisions with high reach, agreement and gut feeling are often not enough. Red teaming brings deliberate opposition into the situation and tests where a plan breaks under real counterarguments. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. |
Complexitydifferent | High | Low | High | Low |
Timedifferent | Several meetings plus preparation and analysis; total effort depends on scope | 30-60 min | 1-4 h | 45-90 min |
Participantsdifferent | Evaluation team, architects, and relevant stakeholders | 3-10 | 3-8 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Risk Matrix, Top Risk List | Challenge Findings, Risk Register, Mitigation Plan | Assumption List, Critical Assumptions, Learning Plan |
Tags1 shared | ArchitectureQualityRiskTradeoffsStakeholders | RiskDecisionPrioritizationAssessment | RiskDecisionSensemaking | AssumptionsRiskDecisionDiscovery |