View methods side by side.
Choose up to four methods. Add them using the search and share the comparison by copying its link.
| Criterion |  UX Research First-click Testing |  Operations Fault Tree Analysis |  Operations 5 Whys |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | When users immediately turn the wrong way on a screen or wireframe, first click testing checks initial orientation at high speed. The first click shows early whether expectation, labeling, and wayfinding fit together. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. |
Complexitydifferent | Low | High | Low | High |
Timedifferent | 1-2 Tage | 2-6 h | 15-30 min | 1-6 Wochen |
Participantsdifferent | 10-30 | 3-8 | 2-6 | 4-10 |
Formatdifferent | Async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Click Heatmap, Success Rate, Design Recommendations | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | UXNavigationFindabilityValidation | RiskRoot causeSafety | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause |