DCIM provides tools to bridge the gap in terms of process and data communication between facilities and IT, but there is still a gap in terms of the engineering consequences of actions. This presentation will give examples of how common practices, at both the rack and the room scale (including the impact of choosing to co-locate different types of IT), can impact availability, capacity and efficiency in different ways. Metrics will be used to quantify the impact of proposed changes so that the business can make IT deployment and infrastructure decisions in a holistic way to fit its needs.