View methods side by side.
Choose up to four methods. Add them using the search and share the comparison by copying its link.
| Criterion |  Operations 8D Problem Solving |  UX Research Card Sorting |  Operations 5 Whys |
|---|---|---|---|
Purposedifferent | 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. | When content only makes sense internally and users can't find the structure again, card sorting exposes their mental order. Terms, groups, and naming are then aligned with the target group's expectations. | 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. |
Complexitydifferent | High | Low | Low |
Timedifferent | 1-6 Wochen | 20-45 min | 15-30 min |
Participantsdifferent | 4-10 | Based on research question | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Content groups, Label set, IA hypotheses | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | Information architectureNavigationStructure | Root causeIncidentLeanProblem solving |
Often compared together
Methods with strong topical overlap with the current selection, not yet in the comparison.
