Creating a Programming Schedule in Revit with Color Coded Conditional Formatting

I had the idea to make this tutorial after a meeting today where we were discussing the formatting of a hard copy programming worksheet.  I wanted to see if we could plug the programming data directly into our Revit model file so that we can track how the spaces within the model compare to the POR.  The process of this tutorial is based on a concept I saw from a tutorial by HOK where they used conditional formatting to color code a schedule for when a room is over the required area or under.  The problem with their method is that it required the area be exactly on target.  I think it is more realistic to set a goal for how close a space must be to the required area.  In the following videos I arbitrarily chose to set the goal to within 10% of required, but you could make it whatever you choose.