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| Criterion |  UX Research User Interviews |  Operations A3 Problem Solving |  Operations Fishbone Diagram |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
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. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. | 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 | Low | Medium | Low | High |
Timedifferent | 30–60 min per interview | 45-90 min | 30-60 min | 2-6 h |
Participantsdifferent | 1 participant per interview | 2-5 | 2-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | A3 Report, Action Plan, Root Cause Analysis | Fishbone Diagram, Cause Categories, Investigation Backlog | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | QualitativeResearchCustomerDiscovery | LeanProblem solvingCoachingOperations | Root causeQualityOperations | RiskQualityOperationsRoot cause |