We have to grasp not only the Know-How but also 'Know Why', if we want to master the Toyota Production System.
The most dangerous kind of waste is the waste we do not recognize.
It's only the last turn of a bolt that tightens it - the rest is just movement.
Lean is a way of thinking- not a list of things to do
Unless you change direction, you will end up where you are headed.
There are four purposes of improvement: easier, better, faster, and cheaper. These four goals appear in the order of priority.