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| Criterion |  Product Discovery Solution Interview |  UX Research Usability Testing |  Facilitation Nominal Group Technique |  Facilitation Dot Voting |
|---|---|---|---|---|
Purposedifferent | When a solution idea is already on the table, it checks how it is understood and evaluated. It looks for resonance, objections, and missing fit early in the conversation. | When a product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | When loud voices could dominate a round, Nominal Group Technique protects individual thinking time from group effects. It collects ideas separately first and only then enables shared weighting. | When a workshop has produced too many options and the group needs to condense quickly, dot voting makes preferences visible in a short time. It bundles individual votes into a solid signal for the next selection. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 30-60 min je Interview | 1-2 h je Session | 60-120 min | 5-15 min |
Participantsdifferent | 5-10 Interviews | Based on research question | 5-12 | 3-20 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Solution Feedback, Objection List, Validation Notes | Usability Issues, Severity List, Recommendations | Ranked Ideas, Clarified Options, Group Priority | Ranked list, Consensus signal, Shortlist |
Tagsno overlap | ValidationInterviewsPrototype | ValidationUXPrototype | FacilitationPrioritizationVotingInclusion | FacilitationVotingConsensusPrioritization |