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| Criterion |  Operations Barrier Analysis |  Delivery Value Stream Mapping |  Operations Fault Tree Analysis |  Operations Causal Factor Analysis |
|---|---|---|---|---|
Purposedifferent | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | When delivery work dissolves into wait times, handoffs, and hidden effort, Value Stream Mapping makes the actual flow visible. The method exposes bottlenecks, idle time, and feedback loops so lead time and improvement levers become tangible. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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. |
Complexitydifferent | Medium | Medium | High | High |
Timedifferent | 2-4 h | 1-3 h | 2-6 h | 2-6 h |
Participantsdifferent | 2-6 | 4-10 | 3-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Current-state map, Future-state map, Bottleneck list | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions |
Tagsno overlap | Root causeSafetyIncident | LeanFlowWasteDelivery | RiskRoot causeSafety | CausalityIncidentRoot causeTimeline |