What I've gathered so far is that things that are more or less settled in advance of going out for procurement...the more specificity, the better. I also hear that maybe there is an opportunity to leave some things open to allow the bidder to be a little creative, to come up with new ideas, etc. What is the right balance here? How specific would a call for proposals have to be in order for you to come up with that apples-to-apples comparison between the bids?
On November 1st, 2016. See this statement in context.