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| Criterion |  UX Research User Interviews |  Operations Ivy Lee Method |  Decision Making Pareto Analysis |  Operations 8D Problem Solving |
|---|---|---|---|---|
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. | With a restless workday full of too many open items, the method creates radical simplicity. It directs attention to a short sequence instead of a broad, still-open field. | In many problem situations, effect is distributed unequally across many causes. A Pareto Analysis separates the few drivers with high leverage from the long remainder and focuses attention on what measurably moves the needle. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. |
Complexitydifferent | Low | Low | Low | High |
Timedifferent | 30–60 min per interview | 5-10 min daily | 30-60 min | 1-6 Wochen |
Participantsdifferent | 1 participant per interview | 1 | 1-6 | 4-10 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Daily Priority List, Completion Notes | Pareto Chart, Top Causes, Focus List | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | QualitativeResearchCustomerDiscovery | PrioritizationProductivityExecution | PrioritizationQualityFocusRoot cause | QualityProblem solvingRoot cause |