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Selected:Failure Scenario AnalysisC4 ModelFailure Mode and Effects AnalysisATAM (Architecture Tradeoff Analysis Method)
| Criterion |  Engineering Failure Scenario Analysis |  Architecture C4 Model |  Operations Failure Mode and Effects Analysis |  Architecture ATAM (Architecture Tradeoff Analysis Method) |
|---|---|---|---|---|
Purposedifferent | In critical processes, it is not enough to plan only for the normal case. Failure Scenario Analysis looks at the path into failure and shows which failures, chains, and control gaps cause the most damage. | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | 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 | Medium | Low | High | High |
Timedifferent | 1-3 h | 1-4 h | 2-6 h | Several meetings plus preparation and analysis; total effort depends on scope |
Participantsdifferent | 3-8 | 1-5 | 3-10 | Evaluation team, architects, and relevant stakeholders |
Formatdifferent | Workshop | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | Context Diagram, Container Diagram, Component Diagram | FMEA Table, Risk Priority, Mitigation Actions | 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 | FailureResilienceRisk | ArchitectureCommunicationVisualization | RiskQualityOperationsRoot cause | ArchitectureQualityRiskTradeoffsStakeholders |