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| Criterion |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Systems Thinking Current Reality Tree |  Operations Root Cause Tree Analysis |
|---|---|---|---|
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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | High | High | Medium |
Timedifferent | Several meetings plus preparation and analysis; total effort depends on scope | 2-6 h | 1-3 h |
Participantsdifferent | Evaluation team, architects, and relevant stakeholders | 3-8 | 2-8 |
Formatdifferent | Workshop + async | Workshop | Workshop |
Outputdifferent | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Current Reality Tree, Core Problems, Intervention Ideas | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | ArchitectureQualityRiskTradeoffsStakeholders | Systems thinkingRoot causeConstraintsCausality | Root causeTreeIncidentQuality |
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