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Selected:C4 ModelFailure Mode and Effects AnalysisGemba WalkATAM (Architecture Tradeoff Analysis Method)
| Criterion |  Architecture C4 Model |  Operations Failure Mode and Effects Analysis |  Operations Gemba Walk |  Architecture ATAM (Architecture Tradeoff Analysis Method) |
|---|---|---|---|---|
Purposedifferent | 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. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | 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 | Low | High |
Timedifferent | 1-4 h | 2-6 h | 30-120 min | Several meetings plus preparation and analysis; total effort depends on scope |
Participantsdifferent | 1-5 | 3-10 | 2-6 | Evaluation team, architects, and relevant stakeholders |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Context Diagram, Container Diagram, Component Diagram | FMEA Table, Risk Priority, Mitigation Actions | Observation Notes, Improvement Ideas | 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 | ArchitectureCommunicationVisualization | RiskQualityOperationsRoot cause | LeanObservationProcessOperations | ArchitectureQualityRiskTradeoffsStakeholders |