I've attached a small sample of an entrance/exit plot in an Excel format. As you can see, it's not completed, but I figured I'd show off a couple of the scenes that have a LOT of ent/ex/QC's.
To explain: This set has a total of 17 access points, on 2 different levels, to enter the stage. They have all been assigned numbers (some of them have a direction and number).
There is almost no rhyme or reason to the specific colors chosen. If several actors exit at various points, but then all come together to re-enter as a group, that change and re-entrance is highlighted in the same color for all the actors. Other than that though, it's really just meant to be a quick visual reference. Something that stands out as different from the colors above and below it.
I feel like the actual form explains itself better than me trying to describe it verbally... but feel free to contact me if you have any questions!