W. C. YeongMichael B. C. KhooL. K. ThamW. L. TeohM. A. Rahim2025-01-032025-01-032017-1010.1080/00224065.2017.11918004https://dspace-cris.utar.edu.my/handle/123456789/10177Monitoring the Coefficient of Variation Using a Variable Sampling Interval EWMA Chartjournal-article