I'm told when to finish. I flip a coin, if it's heads I honestly tell it's impossible and point out a realistic - unacceptable - deadline. If it's tails I take the blame. It doesn't matter really, we're running more than a year late now and the workforce is a single senior who was given a team of 3 relatively intelligent but already overworked high school students (including me) who try to help as much as we can.