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| Criterion |  Operations Root Cause Analysis |  UX Research User Interviews |  Operations Family Tree Analysis |  Operations MORT Analysis |
|---|---|---|---|---|
Purposedifferent | 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 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 series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. | For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | 1-4 h | 30–60 min per interview | 2-4 h | Mehrere Tage bis Wochen |
Participantsdifferent | 3-8 | 1 participant per interview | 2-6 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Interview Notes, Themes, Insight Summary | Family Tree Diagram, Pattern Notes, Systemic Measures | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations |
Tagsno overlap | Root causeProblem solvingQualityIncident | QualitativeResearchCustomerDiscovery | Root causePatternsIncidentSystemic | Root causeSafetySystemicIncident |