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| Criterion |  UX Research Usability Testing |  Innovation Design Sprint |  Operations Causal Factor Analysis |  Systems Thinking Current Reality Tree |
|---|---|---|---|---|
Purposedifferent | 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 the product question is unclear and time pressure is high, the method takes a team from an open idea to a testable solution. It connects problem understanding, decision, and learning in one compact format, lowering the risk of spending a lot of energy on a mere guess. | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. |
Complexitydifferent | Medium | High | High | High |
Timedifferent | 1-2 h je Session | 4-5 Tage | 2-6 h | 2-6 h |
Participantsdifferent | Based on research question | 5-8 | 3-10 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Usability Issues, Severity List, Recommendations | Prototype, Test Findings, Decision Rationale | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Current Reality Tree, Core Problems, Intervention Ideas |
Tagsno overlap | ValidationUXPrototype | Design sprintPrototypeValidationInnovation | CausalityIncidentRoot causeTimeline | Systems thinkingRoot causeConstraintsCausality |