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| Criterion |  Operations Change Analysis |  Architecture ARID (Active Reviews for Intermediate Designs) |  Architecture C4 Model |  Engineering Fault Isolation |
|---|---|---|---|---|
Purposedifferent | 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. | ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification. | 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. | 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. |
Complexitydifferent | Medium | Medium | Low | Medium |
Timedifferent | 45-120 min | 2–4 h review as a planning range; preparation and evaluation additional | 1-4 h | 30-180 min |
Participantsdifferent | 2-6 | Designers, developers as users, and facilitation | 1-5 | 1-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Context Diagram, Container Diagram, Component Diagram | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | ArchitectureEngineeringFeedbackValidationTasks | ArchitectureCommunicationVisualization | TroubleshootingDiagnosisEngineering |