To Copy Is To Invite Disaster.

A Manager Of People Knows That In This Stable State It Is Distracting To Tell The Worker About A Mistake.

Experience By Itself Teaches Nothing.

The Average American Worker Has Fifty Interruptions A Day, Of Which Seventy Percent Have Nothing To Do With Work.

A Rule Should Suit The Purpose.

We Are Being Ruined By The Best Efforts Of People Who Are Doing The Wrong Thing.