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Selected:Blameless Postmortem ARID (Active Reviews for Intermediate Designs)After-Action Review Game Day

Criterion	DevOps Blameless Postmortem	Architecture ARID (Active Reviews for Intermediate Designs)	Operations After-Action Review	DevOps Game Day
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.	ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification.	After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement.	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	Medium	Medium	Low	High
Timedifferent	30-90 min	2–4 h review as a planning range; preparation and evaluation additional	20-45 min	Halber Tag
Participantsdifferent	3-12	Designers, developers as users, and facilitation	3-12	5-20
Formatdifferent	Workshop + async	Workshop + async	Workshop + async	Workshop
Outputdifferent	Postmortem Doc, Action Items, Timeline	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Lessons learned, Action items, Event summary	Simulation Notes, Gaps List, Updated Runbooks
Tagsno overlap	Site Reliability EngineeringIncidentLearningReliability	ArchitectureEngineeringFeedbackValidationTasks	LearningOperationsImprovement	ResilienceOperationsIncident

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