A manager’s output is the output of the organization under his supervision or influence. Put another way, this means that management is a team activity. But no matter how well a team is put together, no matter how well it is directed, the team will perform only as well as the individuals on it. In other words, everything we’ve considered so far is useless unless the members of our team will continually try to offer the best they can do.
— High Output Management by Andrew S. Grove