"A verbal contract isn't worth the paper it's written on."
Samuel Goldwyn
What else do we need in writing besides critical elements of a contract?
Arguably a manager's instructions to a subordinate could (or should) easily include as much detail as would be found in any buy/sell agreement, but no one I know puts as much detail into their management directives as they would in a contract.
Is the fact that they don't the reason things often don't get done as the manager expects? At what point should a manager's instructions be documented in writing? How much detail is needed?
Or is verbal direction between a manager and their subordinates always enough?