If the assumptions are wrong, the conclusions aren't likely to be very good.
If you want something done, ask a busy person.
You should have seen it when I got it!
Adding manpower to a late software project makes it later.
At some time in the life cycle of virtually every organization, its ability to succeed in spite of itself runs out.
When the product is destined to fail, the delivery system will perform perfectly.
Certain things shouldn't be moved.
Established technology tends to persist in the face of new technology.
You can observe a lot just by watching.
Ignorance is no excuse.