Kasmin A, Masood I, Abdul Rahman N, Fadzillah A, Abdol Rahman M. Identifying Unnatural Variation in Precision Rotational Part Manufacturing. IJIE. 2020;13(2):189-195. Accessed April 8, 2026. https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/7641