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| Criterion |  Product Discovery Opportunity Interview |  Operations Root Cause Analysis |  UX Research User Interviews |  Operations Root Cause Tree Analysis |
|---|---|---|---|---|
Purposedifferent | When opportunities are still hidden behind signals of need, it structures conversations around needs and obstacles. It looks for patterns that lead to new product opportunities. | 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 problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | Medium | Medium | Low | Medium |
Timedifferent | 30-60 min je Interview | 1-4 h | 30–60 min per interview | 1-3 h |
Participantsdifferent | 5-12 Interviews | 3-8 | 1 participant per interview | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Opportunity Themes, Customer Quotes | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Interview Notes, Themes, Insight Summary | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | DiscoveryInterviewsOpportunityCustomer | Root causeProblem solvingQualityIncident | QualitativeResearchCustomerDiscovery | Root causeTreeIncidentQuality |