Rozi, F., Pasaribu, U.S., Mukhaiyar, U. and Irianto, D. 2023. The Modified Double Sampling Coefficient of Variation Control Chart . Journal of Mathematical and Fundamental Sciences. 55, 1 (Oct. 2023), 56-76. DOI:https://doi.org/10.5614/j.math.fund.sci.2023.55.1.4.