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

Criterion	Operations After-Action Review	Architecture ARID (Active Reviews for Intermediate Designs)	DevOps Blameless Postmortem	DevOps Game Day
Purposedifferent	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.	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 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	Low	Medium	Medium	High
Timedifferent	20-45 min	2–4 h review as a planning range; preparation and evaluation additional	30-90 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	Lessons learned, Action items, Event summary	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Postmortem Doc, Action Items, Timeline	Simulation Notes, Gaps List, Updated Runbooks
Tagsno overlap	LearningOperationsImprovement	ArchitectureEngineeringFeedbackValidationTasks	Site Reliability EngineeringIncidentLearningReliability	ResilienceOperationsIncident

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