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| Criterion |  Operations Change Analysis |  UX Research User Interviews |  Product Discovery Test Card |
|---|---|---|---|
Purposedifferent | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | Low | Low |
Timedifferent | 45-120 min | 30–60 min per interview | 20-35 min |
Participantsdifferent | 2-6 | 1 participant per interview | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Interview Notes, Themes, Insight Summary | Test Card with a pre-set threshold |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | QualitativeResearchCustomerDiscovery | ExperimentsValidationDiscoveryHypothesis |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
