Economic design of variable sampling intervals EWMA charts with sampling at fixed times using genetic algorithms. - Chao-Yu Chou; Jui-Chang Cheng; Wei-Tseng Lai (Expert Syst. Appl., 2008)

Economic design of variable sampling intervals X charts with A&L switching rule using genetic algorithms. - Hsiu-Hsia Lin; Chao-Yu Chou; Wei-Tseng Lai (Expert Syst. Appl., 2009)