Phenom!

Not a big fan of this kind of thing. it's more after-the-fact rationalization than genuinely illuminating. Also, "rank sum" seems entirely unnecessary. Choose an arbitrary number, say, 10, and then the weighted scores of each of the schools will be proportionately identical, since you're ultimately multiplying the "rank sum" by the arbitrary assessment of relative importance that you've made (i.e. your percentages). Think about it---the rank sum is gotten by summing 1...n, where n is the number of criteria; but the sum obviously doesn't carry over any information about the order in which you've ranked the criteria. That column serves only as a reminder that when you assess the relative importance of each criteria, your numbers should reflect those rankings; but actually calculating that sum is completely unnecessary (and the fact that you've made it a step of the process, and that it changes with the number of criteria, seems to indicate that it's relevant when it's not; though I imagine you might respond that the bigger number makes it easier to split more criteria, while still being able to cope with "rounder numbers," but this is something that an excel spreadsheet would best do in any case.)