Measuring the total cost of ownership of a data center and network room? Here is a place to start...
"An improved method for measuring Total Cost of Ownership of data center and network
room physical infrastructure and relating these costs to the overall Information Technology infrastructure is described, with examples. The cost drivers of TCO are quantified. The largest cost driver is shown to be unnecessary unabsorbed costs resulting from the over sizing of the infrastructure."
Caution: Vendor whitepaper so you will have to cut through the self promotion