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| Criterion |  UX Research Card Sorting |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Operations 8D Problem Solving |  Operations 5 Whys |
|---|---|---|---|---|
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. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. | 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. | 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 | Low | High | High | Low |
Timedifferent | 20-45 min | Several meetings plus preparation and analysis; total effort depends on scope | 1-6 Wochen | 15-30 min |
Participantsdifferent | Based on research question | Evaluation team, architects, and relevant stakeholders | 4-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Content groups, Label set, IA hypotheses | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Root cause notes, Countermeasures |
Tagsno overlap | Information architectureNavigationStructure | ArchitectureQualityRiskTradeoffsStakeholders | QualityProblem solvingRoot cause | Root causeIncidentLeanProblem solving |