A Study on the CUSUM Control Chart in Fluorine Filling of Air Conditioners
Mao Wen-feng · 2000
Teditional Shewhart control charts have low power in detecting mean shift of quality characteristics under control. When an individual - moving range control chart(X - Rm) is used to control its deviations of fluorine filling amount, It is found that X - Rm is too insensitive to the shift of the deviations and unable to calibrate its fluorine filling machines in time. A CUSUM control chart is used to solve the problem and to improve machine calibration,which results in high quality and low cost in fluorine filling process.