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| Criterion |  DevOps ChatOps |  Architecture C4 Model |  DevOps Incident Command |  DevOps Blameless Postmortem |
|---|---|---|---|---|
Purposedifferent | 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. | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. | During an acute incident with several people involved, the method creates a clear leadership and communication structure. It reduces chaos when fast coordination and clean situational awareness are both needed at once. | 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. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | Ongoing | 1-4 h | As needed | 30-90 min |
Participantsdifferent | 2-20 | 1-5 | 4-15 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Chat Transcript, Action Log, Automations | Context Diagram, Container Diagram, Component Diagram | Incident Log, Action Tracker, Stakeholder Updates | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | CollaborationEngineeringIncident | ArchitectureCommunicationVisualization | IncidentOperationsReliability | Site Reliability EngineeringIncidentLearningReliability |