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| Criterion |  Operations Change Analysis |  UX Research Tree Testing |  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. | When a navigation exists but search paths still fail, tree testing checks findability without visual distraction. The method shows whether labels, levels, and paths really lead to the intended destination. | 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 |
Timedifferent | 45-120 min | 1-2 Tage | 30-180 min |
Participantsdifferent | 2-6 | Based on research question | 1-6 |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Findability Metrics, Path Analysis, Revised IA | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | Information architectureNavigationFindability | TroubleshootingDiagnosisEngineering |
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