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| Criterion |  Operations Process Mapping |  Operations Causal Factor Analysis |  Operations Gemba Walk |
|---|---|---|---|
Purposedifferent | With a confusing workflow that has many handoffs, the method makes the actual process visible. It shows where work is passed on, delayed, or duplicated, so improvement targets the right spots. | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 1-3 h | 2-6 h | 30-120 min |
Participantsdifferent | 3-10 | 3-10 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Process Map, Handoff List, Improvement Backlog | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Observation Notes, Improvement Ideas |
Tagsno overlap | ProcessOperationsImprovement | CausalityIncidentRoot causeTimeline | LeanObservationProcessOperations |
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