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Selected:ATAM (Architecture Tradeoff Analysis Method)Fault Tree AnalysisBarrier AnalysisRoot Cause Analysis
| Criterion |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Operations Fault Tree Analysis |  Operations Barrier Analysis |  Operations Root Cause 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 critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | High | High | Medium | Medium |
Timedifferent | Several meetings plus preparation and analysis; total effort depends on scope | 2-6 h | 2-4 h | 1-4 h |
Participantsdifferent | Evaluation team, architects, and relevant stakeholders | 3-8 | 2-6 | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | 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 | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | ArchitectureQualityRiskTradeoffsStakeholders | RiskRoot causeSafety | Root causeSafetyIncident | Root causeProblem solvingQualityIncident |