Once the pilot or proof-of-concept deployment passes the test criteria, you are ready to roll out the deployment to a production environment. Typically, you roll out to a production environment in stages. A staged rollout is especially important for large deployments that affect a significant number of users.
The staged deployment can start with a small set of users and eventually expand the user base until the deployment is available to all users. A staged deployment can also start with a limited set of services and eventually phase in the remaining services. Staging services in phases can help isolate, identify, and resolve problems a service might encounter in a production environment.