It is my conviction that a proposal is never complete and change orders are inevitable. Currently, I build in roughly 10 hours of development time for change orders. I have this in my proposal:
"New Leaf Data, LLC and the client made every effort to describe, illustrate, and understand the needs of the data system during the discovery phase. Nonetheless, it is common that during the development process other needs and/or requirements surface. These are project revisions."
I'm not sure this is the best way (or even if there is a "best" way). How do you handle revisions/change orders?