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| Criterion |  Delivery Value Stream Mapping |  DevOps Blameless Postmortem |  Operations Causal Factor Analysis |
|---|---|---|---|
Purposedifferent | 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. | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | 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 |
Timedifferent | 1-3 h | 30-90 min | 2-6 h |
Participantsdifferent | 4-10 | 3-12 | 3-10 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Current-state map, Future-state map, Bottleneck list | Postmortem Doc, Action Items, Timeline | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions |
Tagsno overlap | LeanFlowWasteDelivery | Site Reliability EngineeringIncidentLearningReliability | CausalityIncidentRoot causeTimeline |
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