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| Criterion |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Delivery Cost of Delay |  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. | Helps clarify scope, order, and delivery flow in concrete terms. It makes work, constraints, and sequence manageable. The result is captured as a Cost of Delay table and prioritization sequence. | 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 | High | Low |
Timedifferent | Several meetings plus preparation and analysis; total effort depends on scope | 90-180 min | 45-90 min |
Participantsdifferent | Evaluation team, architects, and relevant stakeholders | 3-8 | 2-8 |
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 | CoD Table, Prioritization Sequence | Assumption List, Critical Assumptions, Learning Plan |
Tagsno overlap | ArchitectureQualityRiskTradeoffsStakeholders | PrioritizationDeliveryEconomicsDecision | AssumptionsRiskDecisionDiscovery |
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