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measure:9 •deployment frequency •deployment cycle time •change failure rate •development cycle time •number of incidents •mean time to recover (MTTR)
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Gene Kim (The DevOps Handbook: How to Create World-Class Agility, Reliability, & Security in Technology Organizations)
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When humans are necessary, we have found that thinking through and recording the best practices ahead of time in a “playbook” produces roughly a 3x improvement in MTTR as compared to the strategy of “winging it.
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Betsy Beyer (Site Reliability Engineering: How Google Runs Production Systems)