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| Criterion |  Decision Making Decision Tree |  UX Research User Interviews |  UX Research Affinity Diagramming |  Decision Making Assumption Surfacing |
|---|---|---|---|---|
Purposedifferent | For decisions with follow-on paths and dependencies, a linear comparison is often not enough. A Decision Tree shows how options branch under conditions and which consequences hang on each branch. | 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 research notes, feedback, or observations sit unconnected side by side, affinity diagramming sorts the raw material into solid themes. Many individual points turn into patterns that make decisions and opportunities clearer. | 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. |
Complexitydifferent | Medium | Low | Low | Low |
Timedifferent | 30-90 min | 30–60 min per interview | 45–90 min | 45-90 min |
Participantsdifferent | 1-6 | 1 participant per interview | 3-10 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Decision Tree, Option Map, Assumption List | Interview Notes, Themes, Insight Summary | Theme clusters, Insight statements, Opportunity areas | Assumption List, Critical Assumptions, Learning Plan |
Tagsno overlap | DecisionTreeOptions | QualitativeResearchCustomerDiscovery | SynthesisQualitativeRoot cause | AssumptionsRiskDecisionDiscovery |