Performance, Schedule, and Cost
"If you're going to do something truly novel, there isn't anybody who can tell you how long it's going to take or how much it's going to cost. NASA's contract with Grumman stipulated three things: performance, schedule, and cost. Well, it didn't take us long to figure out that it didn't quite work that way. Performance was absolutely critical. Schedule came next, and cost was a derivative of the first two."
Joe Gavin, director, Apollo Lunar Module Program, Grumman Aerospace Corporation.
