There are no creeds in mathematics. – Peter Drucker
Checking the results of a decision against its expectations shows executives what their strengths are, where they need to improve, and where they lack knowledge or information. – Peter Drucker

There are no creeds in mathematics. – Peter Drucker
Checking the results of a decision against its expectations shows executives what their strengths are, where they need to improve, and where they lack knowledge or information. – Peter Drucker
The productivity of work is not the responsibility of the worker but of the manager. – Peter Drucker
The only thing we know about the future is that it will be different. – Peter Drucker