Teoh, Wei Lin, M. S. Fun, Sin Yin Teh, Michael B C Khoo, and W. C. Yeong. 2016. “EXACT RUN LENGTH DISTRIBUTION OF THE DOUBLE SAMPLING X-BAR CHART WITH ESTIMATED PROCESS PARAMETERS”. The South African Journal of Industrial Engineering 27 (1):20-31. https://doi.org/10.7166/27-1-978.