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| Criterion |  DevOps Blameless Postmortem |  DevOps ChatOps |  Systems Thinking Stock and Flow Diagram |  Systems Thinking Behavior Over Time Graph |
|---|---|---|---|---|
Purposedifferent | 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 operational work in a distributed team, the method links communication with direct system control. It records decisions right where the signal, the context, and the execution come together. | A Stock and Flow Diagram shows how stocks, inflows, and outflows shape a system over time. It is especially suited when growth, delays, or capacity limits determine the dynamics. | A Behavior Over Time Graph shows how a metric or observation develops over time. The method makes trends, breaks, and recurring patterns visible that get lost in snapshots. |
Complexitydifferent | Medium | Medium | High | Low |
Timedifferent | 30-90 min | Ongoing | 2-6 h | 20-45 min |
Participantsdifferent | 3-12 | 2-20 | 1-6 | 1-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Chat Transcript, Action Log, Automations | Stock and Flow Model, Dynamics Notes, Simulation Hypotheses | Behavior Over Time Graph, Trend Hypotheses, Key Events |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | CollaborationEngineeringIncident | DynamicsSimulationFeedbackSystems thinking | Systems thinkingPatternsDynamics |