The document discusses implementing DevOps at scale using dynamic test environments. It outlines challenges with static test environments including lack of repeatability and fixed configurations. Dynamic sandboxes delivered as a service are presented as an approach to enable continuous testing by providing on-demand, flexible test environments that integrate with DevOps pipelines. A case study demonstrates how a global manufacturer used dynamic sandboxes to improve developer productivity, reduce risk through production-like testing, and provide better visibility and control of infrastructure usage.