Atta, A. M. A. and Ramli, R. (1) “A Comparison Study on the Performances Of X , EWMA and CUSUM Control Charts for Skewed Distributions Using Weighted Standard Deviations Methods”, Journal of Science and Technology, 3(2). Available at: https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/358 (Accessed: 25May2020).