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| Criterion |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Decision Making Pre-Mortem |  Decision Making DACI |
|---|---|---|---|
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. | In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures. | In cross-functional decisions, responsibilities quickly blur between approval, influence, and execution. DACI arranges these roles so decision pressure, contribution, and information stay cleanly separated. |
Complexitydifferent | High | Low | Low |
Timedifferent | Several meetings plus preparation and analysis; total effort depends on scope | 20–45 min | 30-60 min |
Participantsdifferent | Evaluation team, architects, and relevant stakeholders | Small cross-functional group | 2-10 |
Formatdifferent | 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 list, Mitigation plan, Assumption log | DACI Matrix, Decision Owner, Decision Log |
Tagsno overlap | ArchitectureQualityRiskTradeoffsStakeholders | RiskDecisionFailurePlanning | DecisionRolesGovernanceAlignment |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
