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| Criterion |  Operations Barrier Analysis |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Operations Change Analysis |
|---|---|---|---|
Purposedifferent | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | 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. | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. |
Complexitydifferent | Medium | High | Medium |
Timedifferent | 2-4 h | Several meetings plus preparation and analysis; total effort depends on scope | 45-120 min |
Participantsdifferent | 2-6 | Evaluation team, architects, and relevant stakeholders | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Change Matrix, Cause Hypotheses, Validation Questions, Action List |
Tagsno overlap | Root causeSafetyIncident | ArchitectureQualityRiskTradeoffsStakeholders | ChangeRoot causeTroubleshootingComparison |
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