2002), Wu et al. (2009) and Yum and Kim (2011).
As stated above, the development of control charts using
the process capability index (PCI) has attracted researchers
for the last three decade. The PCI has been used as a tool in
industry to monitor the performance of the process. The PCI
is very helpful and guides industrialists to manufacture products
according to the given specification limits. Among the
PCIs, the simplest and widely used index is Cp(Kane, 1986;
Kotz and Johnson, 2002). The 95% confidence limits for Cp
and Cpk were developed by Chou et al. (1990) and Bissell
(1990). Balamurali and Kalyanasundaram (2002) developed
the confidence limits using the bootstrap method for Cp,Cpk
and Cpm. According to Subramani and Balamurali (2012),