boss: how confident are you in your analysis?
dilbert: very confident.
dilbert: unless i used the wrong discount rate, which is hard to know.
boss: but otherwise, it's solid?
dilbert: except for the installation and maintenance costs, which are wild guesses. and we don't know if we sized the project right, so costs could be double or triple.
boss: it sounds as if you applied math to a bunch of wild guesses.
dilbert: yes, but i got the result you wanted.
boss: next time, just say that.