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| Criterion |  Operations 8D Problem Solving |  Systems Thinking Behavior Over Time Graph |  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. | A Behavior Over Time Graph shows how a metric or observation develops over time. The method makes trends, breaks, and recurring patterns visible that get lost in snapshots. | 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 | 1-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Behavior Over Time Graph, Trend Hypotheses, Key Events | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | Systems thinkingPatternsDynamics | Root causeIncidentLeanProblem solving |
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