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| Criterion |  Engineering Fault Isolation |  Architecture Architecture Decision Record |  Architecture SAAM (Software Architecture Analysis Method) |
|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | SAAM helps teams judge an architecture’s suitability for selected tasks and changes. It is particularly useful for examining modifiability and comparing architecture alternatives with clear reasoning. |
Complexitydifferent | Medium | Low | High |
Timedifferent | 30-180 min | 15-45 min | Preparation, scenario analysis, and findings review; effort depends on scope |
Participantsdifferent | 1-6 | 1-3 | Architecture experts and stakeholders for scenarios and weighting |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | ADR File, Decision Log, Rationale | Domain functions mapped to components and connections, Quality attributes and evaluation criteria, Typical tasks and their effects on the architecture, Reasoned evaluation or comparison of alternatives |
Tagsno overlap | TroubleshootingDiagnosisEngineering | ArchitectureRationaleDocumentationGovernance | ArchitectureChangeAnalysisComparisonQuality |
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