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Selected:Fault IsolationArchitecture Decision RecordSAAM (Software Architecture Analysis Method)Change Analysis
| Criterion |  Engineering Fault Isolation |  Architecture Architecture Decision Record |  Architecture SAAM (Software Architecture Analysis Method) |  Operations Change Analysis |
|---|---|---|---|---|
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. | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. |
Complexitydifferent | Medium | Low | High | Medium |
Timedifferent | 30-180 min | 15-45 min | Preparation, scenario analysis, and findings review; effort depends on scope | 45-120 min |
Participantsdifferent | 1-6 | 1-3 | Architecture experts and stakeholders for scenarios and weighting | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + 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 | Change Matrix, Cause Hypotheses, Validation Questions, Action List |
Tagsno overlap | TroubleshootingDiagnosisEngineering | ArchitectureRationaleDocumentationGovernance | ArchitectureChangeAnalysisComparisonQuality | ChangeRoot causeTroubleshootingComparison |