Economic Control of Quality of Manufactured Product

appears apply approach approximately assignable causes assume assumption average basis calculated causes cells cent chance causes chapter consider constant correlation coefficient Criterion curve defective depends depth determine discussion distribution function drawn economic effects engineer equation error establish estimate example expected value expressed fact follows four fraction frequency distribution given gives Hence illustration important indicated interest involves kind known large numbers limits material mathematical maximum mean measure method nature necessary normal normal universe objective observed values obtained Obviously physical pieces possible practical prediction present probability problem quality characteristics question range ratio reasonable regression relationship represent respect sample sense shown shows simple specification standard deviation statistical Table taken tensile strength theoretical theory thing tolerance true Type universe variability variation