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Selected:ATAM (Architecture Tradeoff Analysis Method)Barrier AnalysisFailure Mode and Effects AnalysisFault Tree Analysis
| Criterion |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Operations Barrier Analysis |  Operations Failure Mode and Effects Analysis |  Operations Fault 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. | 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. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. |
Complexitydifferent | High | Medium | High | High |
Timedifferent | Several meetings plus preparation and analysis; total effort depends on scope | 2-4 h | 2-6 h | 2-6 h |
Participantsdifferent | Evaluation team, architects, and relevant stakeholders | 2-6 | 3-10 | 3-8 |
Formatdifferent | Workshop + async | 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 | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | FMEA Table, Risk Priority, Mitigation Actions | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | ArchitectureQualityRiskTradeoffsStakeholders | Root causeSafetyIncident | RiskQualityOperationsRoot cause | RiskRoot causeSafety |