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Selected:Fault Tree AnalysisCurrent Reality TreeATAM (Architecture Tradeoff Analysis Method)8D Problem Solving
| Criterion |  Operations Fault Tree Analysis |  Systems Thinking Current Reality Tree |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Operations 8D Problem Solving |
|---|---|---|---|---|
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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | 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 an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. |
Complexitysame | High | High | High | High |
Timedifferent | 2-6 h | 2-6 h | Several meetings plus preparation and analysis; total effort depends on scope | 1-6 Wochen |
Participantsdifferent | 3-8 | 3-8 | Evaluation team, architects, and relevant stakeholders | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Current Reality Tree, Core Problems, Intervention Ideas | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | RiskRoot causeSafety | Systems thinkingRoot causeConstraintsCausality | ArchitectureQualityRiskTradeoffsStakeholders | QualityProblem solvingRoot cause |