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| Criterion |  UX Research User Interviews |  Operations A3 Problem Solving |  Product Discovery Opportunity Interview |  Operations 5 Whys |
|---|---|---|---|---|
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 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. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Low | Medium | Medium | Low |
Timedifferent | 30–60 min per interview | 45-90 min | 30-60 min je Interview | 15-30 min |
Participantsdifferent | 1 participant per interview | 2-5 | 5-12 Interviews | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | A3 Report, Action Plan, Root Cause Analysis | Interview Notes, Opportunity Themes, Customer Quotes | Root cause notes, Countermeasures |
Tagsno overlap | QualitativeResearchCustomerDiscovery | LeanProblem solvingCoachingOperations | DiscoveryInterviewsOpportunityCustomer | Root causeIncidentLeanProblem solving |