Engineering problems will first manifest themselves in a schedule slip someplace. Generally, as I have learned since then, if you have a technical problem someplace or some kind of a problem, it will manifest itself first as a schedule slip. Then, it will eventually become a cost problem. If you wait to see the cost problem, something has already happened over which you have long since lost control. I always believed in the old adage, ‘Time is money’; but if you could control the schedule, you could, in fact, control the cost ultimately in what was going on.
– LtGen Hans “Whitey” Driessnack, USAF