Abstract:
The purpose of this research is to propose a mixed Cumulative Sum-Tukeys Control Chart (CUSUM-TCC) for detecting process dispersion using moving range, when the process is symmetric and asymmetric distributions and compared the performance to detect a change of CUSUM-TCC control chart with Tukeys control chart (TCC) and Cumulative Sum control chart (CUSUM).The performance of detecting a change of control charts measured by the average run length(ARL).The in control average run length ( ) is given to 370 and 500. In order to approximate ARL, the Monte Carlo simulation method is used and the numerical results found that CUSUM-TCC is superior to TCC and CUSUM for all case of asymmetric distribution. However, for the cases of = 370 and 500and the process has laplace distribution, the performance of TCC is superior to the mixed CUSUM-TCC and CUSUM control charts when the magnitudes of change in dispersion parameter and respectively for MR= 3.