The manager's function is not to make people work, but to make it possible for people to work.
The decision to apply schedule pressure to a project needs to be made in much the same way you decide whether or not to punish your child: If your timing is impeccable so the justification is easily apparent, then it can help. If you do it all the time, it's just a sign that you've got troubles of your own.
When a worker seems unable to perform and seems not tacare at all about the quality of his work, for example, it is a sure sign that the poor fellow is overwhelmed by the difficulty of the work. He doesn't need more pressure. What he needs is reassignment, possibly to another company.
People under time pressure don't work better; they just work faster.
Productivity: Winning Battles and Losing Wars
MAKE A CHEESEBURGER, SELL A CHEESEBURGER