Theoretically, your starting five would be your finishing five. If you can figure out who isn't in foul trouble, who's had a good or bad game and if BU is in front or behind, then you can figure out who will finish the game. There are so many factors during a game that impact who is going to be playing at crunch time.
Would you have someone like Zach Andrews in the game with a 2 point lead with the ball and 10 seconds left? Probably not. However, if BU is down two with the ball and 10 seconds, he probably would be in there (unless he already had five fouls).