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| Criterion |  UX Research User Interviews |  Product Discovery Kano Model |  Decision Making Assumption Surfacing |  Delivery Cost of Delay |
|---|---|---|---|---|
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. | When features need to be distinguished by their effect on satisfaction, it makes expectations and surprises comparable. It separates basic needs, performance contribution, and delight. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | Helps clarify scope, order, and delivery flow in concrete terms. It makes work, constraints, and sequence manageable. The result is captured as a Cost of Delay table and prioritization sequence. |
Complexitydifferent | Low | Medium | Low | High |
Timedifferent | 30–60 min per interview | 1-2 Tage | 45-90 min | 90-180 min |
Participantsdifferent | 1 participant per interview | 10-50 | 2-8 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | Kano Matrix, Feature Classes, Priority Themes | Assumption List, Critical Assumptions, Learning Plan | CoD Table, Prioritization Sequence |
Tagsno overlap | QualitativeResearchCustomerDiscovery | SatisfactionPrioritizationCustomer | AssumptionsRiskDecisionDiscovery | PrioritizationDeliveryEconomicsDecision |