"Cease dependence on mass instpection. American firms typically inspect a product as it comes off the line .... Defective parts are either thrown out or reworked. In effect a company is paying workers to make defects and to correct them. Quality comes not from inspection [at the end of the line] but improvement of the process."

(Deming quoted by Mary Walton, Deming Management at Work, pp. 34-35.)