An interesting metric might be if the organization's min-cut-set bandwidth is exceeded by its regional access bandwidth.

This is a brilliant idea, but how do you propose to measure the regional access bandwidth, or the even more fun task of determining the total bandwidth so that you can determine the pro rata share due any arbitrary subtree? I don't propose to measure it. I assume that the organization has the wherewithal to track its own circuits. I know, I know, I'm naive for living in an altruistic Internet .... Tony