All Models Are Wrong; Some Models Are

One Cannot Be Successful On Visible Figures Alone ... The Most Important Figures That One Needs For Management Are Unknown Or Unknowable, But Successful Management Must Nevertheless Take Account Of Them.

When A Worker Has Reached A Stable State, Further Training Will Not Help Him.

Shrink, Shrink Variation, To Reduce The Loss.

Judging People Does Not Help Them.

The Customer Is The Most Important Part Of The Production Line.