From the Ask Tom mailbag:

Question:
You have talked about managers and systems. And you’ve described the most important system for a manager as the People System. What’s inside that system?

Response:
There are three primary accountabilities for any Manager.

• First, is that the Manager is responsible for the output of the team. I don’t listen to excuses that some team member failed to perform, or some other team member fell short. I hold the Manager accountable for the output of the team.
• The element that supports that output is the ability of the Manager to assemble the team together. This has a great deal to do with identifying and selecting talent.
• Once assembled, the Manager must lead the team to work together, competently and with commitment in pursuit of the goal.

Failure in any part of this system falls to the Manager.