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| Criterion |  Operations 5 Whys |  Operations 8D Problem Solving |  Agile 4Ls Retrospective |
|---|---|---|---|
Purposedifferent | 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. | When a sprint should not only be assessed but also learned from, it captures experience in clear learning categories. It records what worked, what's missing, and what should run differently next time. |
Complexitydifferent | Low | High | Low |
Timedifferent | 15-30 min | 1-6 Wochen | 45–75 min |
Participantsdifferent | 2-6 | 4-10 | Team members involved |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause | RetrospectiveLearningReflectionTeam |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
