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Selected:Usability TestingChange AnalysisARID (Active Reviews for Intermediate Designs)Fault Isolation
| Criterion |  UX Research Usability Testing |  Operations Change Analysis |  Architecture ARID (Active Reviews for Intermediate Designs) |  Engineering Fault Isolation |
|---|---|---|---|---|
Purposedifferent | When a product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | 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. | 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. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 1-2 h je Session | 45-120 min | 2–4 h review as a planning range; preparation and evaluation additional | 30-180 min |
Participantsdifferent | Based on research question | 2-6 | Designers, developers as users, and facilitation | 1-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Usability Issues, Severity List, Recommendations | 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 | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area |
Tagsno overlap | ValidationUXPrototype | ChangeRoot causeTroubleshootingComparison | ArchitectureEngineeringFeedbackValidationTasks | TroubleshootingDiagnosisEngineering |