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Selected:Fault Tree AnalysisCausal Factor AnalysisATAM (Architecture Tradeoff Analysis Method)MORT Analysis
| Criterion |  Operations Fault Tree Analysis |  Operations Causal Factor Analysis |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Operations MORT Analysis |
|---|---|---|---|---|
Purposedifferent | 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 an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | 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 safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. |
Complexitysame | High | High | High | High |
Timedifferent | 2-6 h | 2-6 h | Several meetings plus preparation and analysis; total effort depends on scope | Mehrere Tage bis Wochen |
Participantsdifferent | 3-8 | 3-10 | Evaluation team, architects, and relevant stakeholders | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations |
Tagsno overlap | RiskRoot causeSafety | CausalityIncidentRoot causeTimeline | ArchitectureQualityRiskTradeoffsStakeholders | Root causeSafetySystemicIncident |