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| Criterion |  Innovation Brainwriting |  DevOps Blameless Postmortem |  Operations Barrier Analysis |  Operations Causal Factor Analysis |
|---|---|---|---|---|
Purposedifferent | When loud voices or hierarchy distort the idea search, the method creates a quiet entry into joint development. It gives everyone thinking space and gathers contributions without social brakes, making diversity more visible and easier to build on. | 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 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. | 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 | Low | Medium | Medium | High |
Timedifferent | 15-30 min | 30-90 min | 2-4 h | 2-6 h |
Participantsdifferent | 3-12 | 3-12 | 2-6 | 3-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Idea sheets, Expanded concepts, Prioritized list | Postmortem Doc, Action Items, Timeline | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions |
Tagsno overlap | BrainstormingCollaborationInclusionIdeas | Site Reliability EngineeringIncidentLearningReliability | Root causeSafetyIncident | CausalityIncidentRoot causeTimeline |