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| Criterion |  Operations Kaizen Event |  Operations Root Cause Tree Analysis |  Operations 8D Problem Solving |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | For a tightly scoped process segment with noticeable waste, the method bundles shared energy for change. It suits situations that call for fast learning loops and visible adjustments. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | 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 process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Medium | Medium | High | High |
Timedifferent | 0.5-5 Tage | 1-3 h | 1-6 Wochen | 2-6 h |
Participantsdifferent | 4-10 | 2-8 | 4-10 | 3-10 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Cause Tree, Evidence Notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | LeanContinuous improvementOperations | Root causeTreeIncidentQuality | QualityProblem solvingRoot cause | RiskQualityOperationsRoot cause |