“…The conforming run length (CRL) chart proposed by Bourke (1991) was originally developed for attribute quality control to detect the shift in fraction non-conforming p, and was studied recently by many researchers (Kaminsky, Benneyan, & Davis, 1992;Wu, Yeo, & Fan, 2000;Xie, Goh, & Lu, 1998;Yang, Xie, Kuralmani, & Tsui, 2002). The CRL is defined as the number of conforming units between two non-conforming units, inclusive of the ending non-conforming unit.…”