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| Criterion |  Engineering Fault Isolation |  UX Research Usability Testing |  Engineering Hypothesis-Driven Troubleshooting |  Innovation Design Sprint |
|---|---|---|---|---|
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. | 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. | When systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. | When the product question is unclear and time pressure is high, the method takes a team from an open idea to a testable solution. It connects problem understanding, decision, and learning in one compact format, lowering the risk of spending a lot of energy on a mere guess. |
Complexitydifferent | Medium | Medium | Medium | High |
Timedifferent | 30-180 min | 1-2 h je Session | 30-240 min | 4-5 Tage |
Participantsdifferent | 1-6 | Based on research question | 1-6 | 5-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Usability Issues, Severity List, Recommendations | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | Prototype, Test Findings, Decision Rationale |
Tagsno overlap | TroubleshootingDiagnosisEngineering | ValidationUXPrototype | TroubleshootingProblem solvingDiagnosis | Design sprintPrototypeValidationInnovation |