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| Criterion |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Facilitation Expectation Mapping |  Decision Making Decision Matrix |
|---|---|---|---|
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 roles, interfaces, or projects fail because of differing expectations, Expectation Mapping surfaces these differences. It shows what each side takes for granted and where the pictures diverge. | When several options collide with several criteria, comparison quickly becomes subjective. A Decision Matrix makes the trade-off visible and brings weighting, criteria, and options into a shared logic. |
Complexitydifferent | High | Low | Medium |
Timedifferent | Several meetings plus preparation and analysis; total effort depends on scope | 45-90 min | 45-90 min |
Participantsdifferent | Evaluation team, architects, and relevant stakeholders | 3-12 | 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 | Expectation Map, Alignment Notes, Agreements | Decision Matrix, Scoring Rationale, Selected Option |
Tagsno overlap | ArchitectureQualityRiskTradeoffsStakeholders | AlignmentStakeholdersTeam | DecisionCriteriaScoringTradeoffs |
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