Knowledge is theory. We should be thankful if action of management is based on theory. Knowledge has temporal spread. Information is not knowledge. The world is drowning in information but is slow in acquisition of knowledge. There is no substitute for knowledge.

We know what we told him, but we don't know what he heard.

You can not achieve an aim unless you have a method.

The result of long-term relationships is better and better quality, and lower and lower costs.

Eliminate numerical quotas, including Management by Objectives.

A rule should suit the purpose.

When a system is stable, telling the worker about mistakes is only tampering.