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| Criterion |  UX Research Diary Study |  Product Discovery Jobs to Be Done |  Operations 5 Whys |
|---|---|---|---|
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 switching motives and progress are unclear, it reconstructs the situation from real customer circumstances. It shows why a switch happens and what kind of progress is being sought. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 1-4 Wochen | 1-3 Wochen | 15-30 min |
Participantsdifferent | 5-20 | 5-12 Interviews | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Job Stories, Outcome Statements, Opportunity List | Root cause notes, Countermeasures |
Tagsno overlap | UX researchTrackingBehavior | CustomerOutcomesNeeds | Root causeIncidentLeanProblem solving |
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