In order for you to keep up with customer demand, you need to create a deployment pipeline. You need to get everything in version control. You need to automate the entire environment creation process. You need a deployment pipeline where you can create test and production environments, and then deploy code into them, entirely on demand.
—Erik to Grasshopper, The Phoenix Project 
Real, tangible development value occurs only when the end users are successfully operating the Solution in their environment. This demands that the complex routine of deploying to operations, or moving to production, receives early and meaningful attention ...