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| Criterion |  UX Research Card Sorting |  Product Strategy Lean Canvas |  Operations 5 Whys |  Operations A3 Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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. | When an early product bet still has too many open points, it brings target group, problem, and assumptions into a single view. It condenses the idea so core risks become nameable. | 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 a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. |
Complexitydifferent | Low | Medium | Low | Medium |
Timedifferent | 20-45 min | 45-90 min | 15-30 min | 45-90 min |
Participantsdifferent | Based on research question | 1-6 | 2-6 | 2-5 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Content groups, Label set, IA hypotheses | Lean Canvas, Core Assumptions, Experiment Backlog | Root cause notes, Countermeasures | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | Information architectureNavigationStructure | StartupLeanAssumptionsBusiness model | Root causeIncidentLeanProblem solving | LeanProblem solvingCoachingOperations |