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Selected:Expectation MappingFault Tree AnalysisBarrier AnalysisATAM (Architecture Tradeoff Analysis Method)
| Criterion |  Facilitation Expectation Mapping |  Operations Fault Tree Analysis |  Operations Barrier Analysis |  Architecture ATAM (Architecture Tradeoff Analysis Method) |
|---|---|---|---|---|
Purposedifferent | When roles, interfaces, or projects fail because of differing expectations, Expectation Mapping surfaces these differences. It shows what each side takes for granted and where the pictures diverge. | 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. | 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. |
Complexitydifferent | Low | High | Medium | High |
Timedifferent | 45-90 min | 2-6 h | 2-4 h | Several meetings plus preparation and analysis; total effort depends on scope |
Participantsdifferent | 3-12 | 3-8 | 2-6 | Evaluation team, architects, and relevant stakeholders |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Expectation Map, Alignment Notes, Agreements | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations |
Tagsno overlap | AlignmentStakeholdersTeam | RiskRoot causeSafety | Root causeSafetyIncident | ArchitectureQualityRiskTradeoffsStakeholders |