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| Criterion |  Systems Thinking Future Reality Tree |  DevOps Blameless Postmortem |  DevOps Game Day |
|---|---|---|---|
Purposedifferent | A Future Reality Tree shows how desired actions are meant to lead to a better system state. The method checks whether a path of change holds together logically before time flows into implementation. | 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. | In preparing for rare incidents, the method tests response capability under controlled conditions. It shows where assumptions about stability, roles, and recovery are too optimistic. |
Complexitydifferent | High | Medium | High |
Timedifferent | 2-4 h | 30-90 min | Halber Tag |
Participantsdifferent | 3-8 | 3-12 | 5-20 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Postmortem Doc, Action Items, Timeline | Simulation Notes, Gaps List, Updated Runbooks |
Tagsno overlap | Theory of ConstraintsSystems thinkingChange | Site Reliability EngineeringIncidentLearningReliability | ResilienceOperationsIncident |
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