As much as 95% of quality related problems in the factory can be solved with seven fundamental quantitative tools.
When you see data, doubt [them]! When you see measurements, doubt them!
Quality control starts and ends with training.
As with many other things, there is a surprising amount of prejudice against quality control, but the proof of the pudding is still in the eating.
Failure is the seed of success
In management, the first concern of the company is the happiness of people who are connected with it. If the people do not feel happy and cannot be made happy, that company does not deserve to exist.