Statistical process control for quality improvement

The Deming philosophy of statistical process control has revolutionized quality control in Japan. In the US though, the general thrust has been to attempt some sort of synthesis between the quality assurance protocols developed during World War II and the quality improvement paradigm of Deming. The authors' empirical experience indicates that Deming's approach, based as it is on the importance of contamination from assignable causes, conforms more closely to the way that most processes work in industrial service settings.