Where do we go wrong?

I've been around a number of start-up programs, and most of them were alot alike:  Engineering was late and over budget, and it was always "our fault."  Over the years, I've come to recognize that there is some truth to that.  Engineering seldom steps up to the plate like I think we are capable of doing.  On the other hand, the deck is usually stacked against us before we start.  Estimates are cut to win the job; schedule is squandered during the bid and proposal phase, but the delivery date never moves....

You've been there; you've seen it too.  I'd like to hear from you.  Where do we go wrong as an industry, and as a profession?  What do we need to do to improve?  I believe we can improve.  Dramatically.  What do you think?