From a purely commercial viewpoint, break-even is where you make enough money to pay the development costs (and the rest of the company overheads over the period) so it isn't *too* far fetched to say that "success" is the 83% of projects that are not "so catastrophically bad they had threatened the very existence of the company".
That's especially true if the company learned something along the way. What doesn't kill you makes you stronger and all that...
Biting the hand that feeds IT
