Humble, J., & Farley, D. (2010). Continuous Delivery: Reliable Software Releases through Build, Test, and Deployment Automation . Addison-Wesley.
Prior to DevOps, the “throw it over the wall” model dominated. Once code was deemed complete by Dev, it was handed to Ops for deployment. This link was weak, asynchronous, and document-heavy. Devops link
This disconnect created a negative feedback loop: Ops resisted frequent deployments, leading Dev to bypass formal processes, leading to brittle deployments, leading Ops to increase resistance further. Humble, J
Kim, G., Behr, K., & Spafford, G. (2013). The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win . IT Revolution Press. leading Dev to bypass formal processes