You HW, Chong Z, Teoh WL, Khoo M, Yeong W. An Expected Average Run Length (EARL) Performance Comparison of the SSGR and EWMA Control Charts. IJIE. 2023;15(5):35-40. Accessed April 8, 2026. https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/14197