Heisenberg principle of projects

Words of wisdom (and caution) from Incipient(thoughts): the project managment equivalent of the Heisenberg uncertainty principle:

The more control you want on their status (or position), the less you have over their velocity. Pick one of the two - and pick wisely.

I would be tempted to phrase it : You can have Control (knowlegde of status, direction) or Velocity (forward motion), but not both.