May 17, 2017 Volume 15, issue 2 PDF The Calculus of Service Availability You're only as available as the sum of your dependencies. Ben Treynor, Mike Dahlin, Vivek Rau, Betsy Beyer As detailed in Site Reliability Engineering: How Google Runs Production Systems1 (hereafter referred to as the SRE book), Google products and services seek high-velocity feature development while maintaining aggressive S