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| Criterion |  Operations Kaizen Event |  UX Research User Interviews |  Operations Failure Mode and Effects Analysis |  Operations Fishbone Diagram |
|---|---|---|---|---|
Purposedifferent | For a tightly scoped process segment with noticeable waste, the method bundles shared energy for change. It suits situations that call for fast learning loops and visible adjustments. | 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 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. | 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 | Medium | Low | High | Low |
Timedifferent | 0.5-5 Tage | 30–60 min per interview | 2-6 h | 30-60 min |
Participantsdifferent | 4-10 | 1 participant per interview | 3-10 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop | Workshop |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Interview Notes, Themes, Insight Summary | FMEA Table, Risk Priority, Mitigation Actions | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | LeanContinuous improvementOperations | QualitativeResearchCustomerDiscovery | RiskQualityOperationsRoot cause | Root causeQualityOperations |