Standards should not be forced down from above but rather set by the production workers themselves.
No one has more trouble than the person who claims to have no trouble
Ask 'why' five times about every matter.
The Toyota style is not to create results by working hard. It is a system that says there is no limit to people's creativity. People don't go to Toyota to 'work' they go there to 'think'.
Progress cannot be generated when we are satisfied with existing situations.
Data is of course important in manufacturing, but I place the greatest emphasis on facts.