With the recent explosion in computing power available in a single system, much attention has been turned towards the concepts of virtualization of these systems. As this trend continues, it is logical to assume that deploying an entire web-based service on an externally managed virtualized environment will soon be not only plausible, but common. In such an environment, the different components of the system would be logical machines, which would each appear to have private access to CPUs, memory, and other resources, and which would each be running an independent operating system. Because resources are not shared between virtual machines, administrators will need to make decisions about how much they should invest in resources and when more (or less) resource capacity is a good investment. An autonomous agent that can determine the Return on Investment (ROI) of the resource can make this management problem easier.