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| Criterion |  UX Research User Interviews |  Operations ABC Analysis |  Operations Root Cause Analysis |  Operations Fishbone Diagram |
|---|---|---|---|---|
Purposedifferent | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | With many similar objects of differing economic significance, the method prioritizes effort by effect. It separates what needs regular steering from what rarely needs attention. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | 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. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 30–60 min per interview | 30-60 min | 1-4 h | 30-60 min |
Participantsdifferent | 1 participant per interview | 1-5 | 3-8 | 2-8 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | ABC Classification, Focus Rules, Control List | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | QualitativeResearchCustomerDiscovery | PrioritizationOperationsPortfolio | Root causeProblem solvingQualityIncident | Root causeQualityOperations |