People care more for themselves when they contribute to the system.
Research shows that the climate of an organization influences an individuals contribution far more than the individual himself.
Without questions, there is no learning.
Understanding variation is the key to success in quality and business.
A manager of people knows that in this stable state it is distracting to tell the worker about a mistake.
Quality is made in the board room. A worker can deliver lower quality, but she cannot deliver quality better than the system allow.