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| Criterion |  UX Research Diary Study |  Operations Fishbone Diagram |  Agile Specification by Example |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | When experiences build up over days or weeks and a single session cannot capture them, Diary Study records the course of everyday life. Recurring triggers, moods, and habits become visible this way, beyond the sharpness of memory. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | When business rules need to become precise, it ties language, example, and test together. It sorts work by value, risk, and delivery ability. The result is captured as an Example Table and Acceptance Tests. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | 1-4 Wochen | 30-60 min | 60-90 min pro Feature | 2-6 h |
Participantsdifferent | 5-20 | 2-8 | 3-6 | 3-10 |
Formatdifferent | Async | Workshop | Workshop | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Fishbone Diagram, Cause Categories, Investigation Backlog | Example Table, Acceptance Tests | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | UX researchTrackingBehavior | Root causeQualityOperations | AgileRequirementsExamplesBehavior-Driven Development | RiskQualityOperationsRoot cause |