Experience By Itself Teaches Nothing.

Inspection With The Aim Of Finding The Bad Ones And Throwing Them Out Is Too Late, Ineffective, And Costly. Quality Comes Not From Inspection But From Improvement Of The Process.

There Is No Economy In Having One Operation Produce A Part And Another Separate The Good Ones From The Bad Ones.

Without Theory There Is Nothing To Modify Or Learn.

The Result Of Long-term Relationships Is Better And Better Quality, And Lower And Lower Costs.

No One Can Measure The Loss Of Business That May Arise From A Defective Item That Goes Out To A Customer.