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Selected:Fault Tree AnalysisEmpathy MappingATAM (Architecture Tradeoff Analysis Method)Affinity Diagramming
| Criterion |  Operations Fault Tree Analysis |  UX Research Empathy Mapping |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  UX Research Affinity Diagramming |
|---|---|---|---|---|
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. | When a lot is assumed about a target group but little is seen jointly, empathy mapping makes knowledge and gaps directly comparable. The picture also shows which assumptions hold up and where evidence is missing. | 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. | When research notes, feedback, or observations sit unconnected side by side, affinity diagramming sorts the raw material into solid themes. Many individual points turn into patterns that make decisions and opportunities clearer. |
Complexitydifferent | High | Low | High | Low |
Timedifferent | 2-6 h | 30–60 min | Several meetings plus preparation and analysis; total effort depends on scope | 45–90 min |
Participantsdifferent | 3-8 | 4-8 | Evaluation team, architects, and relevant stakeholders | 3-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Empathy Map, Assumptions List, Research Gaps | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Theme clusters, Insight statements, Opportunity areas |
Tagsno overlap | RiskRoot causeSafety | SynthesisQualitativeWorkshop | ArchitectureQualityRiskTradeoffsStakeholders | SynthesisQualitativeRoot cause |