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| Criterion |  Agile T-Shirt Sizing |  Architecture ATAM (Architecture Tradeoff Analysis Method) |
|---|---|---|
Purposedifferent | When effort only needs to be classified roughly, it makes comparability more important than false precision. It helps sort work quickly into manageable sizes. | 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. |
Complexitydifferent | Low | High |
Timedifferent | 15-45 min | Several meetings plus preparation and analysis; total effort depends on scope |
Participantsdifferent | 2-12 | Evaluation team, architects, and relevant stakeholders |
Formatsame | Workshop + async | Workshop + async |
Outputdifferent | Size Buckets, Rough Backlog Map, Split Candidates | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations |
Tagsno overlap | EstimationAgileRoadmap | ArchitectureQualityRiskTradeoffsStakeholders |
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