I heard recently about a big Spanish bank that published a request for proposal (RFP) to buy computer monitors. In evaluating the various RFPs, the bank calculated the effective cost of the monitor as the purchase cost plus the incremental energy cost for the less efficient models over five years. That got me thinking about the logic (or lack thereof) in this approach. I’ve worked closely with a number of banks over the past few years including a very large bank. So, with some “real” numbers in mind, I ran some comparisons to determine if there might be a more effective approach.