Quotes by W. Edwards Deming

Inspection does not improve the quality, nor guarantee quality. Inspection is too late. The quality, good or bad, is already in the product. As Harold F. Dodge said, “You can not inspect quality into a product.”


It is extension of application that discloses inadequacy of a theory, and need for revision, or even new theory. Again, without theory, there is nothing to revise. Without theory, experience has no meaning. Without theory, one has no questions to ask. Hence without theory, there is no learning.


The basic problem anywhere is quality. What is quality? A product or service possesses quality if it helps someone and enjoys a sustainable market. Trade depends on quality.


Support of top management is not sufficient. It is not enough that top management commit themselves for life to quality and productivity. They must know what it is that they are committed to — that is, what they must do. These obligations can not be delegated. Support is not enough: action is required.