In this papers, we address a double samplimg C pm control chart. It is well known that a
double sampling scheme can reduce average sampling number in comparison with a single …

Process capability indices are widely used to provide the evaluation measure of a process.
Especially, the process capability index C pm, which is defined by the range of the process …

The (x¯, s) control chart is one of simultaneous control charts to monitor process mean and
variance on x¯-s coordinate. The primary purpose of the (x¯, s) control chart has been the …

It is assumed that the presence of the assignable cause may shift either process mean or
standard deviation from their target value. But in the design of joint X̄ and R charts, it is …

Purpose–The purpose of this paper is to introduce a new design of the X¯ chart to catch
smaller shifts in the process average as well as to maintain the simplicity like the Shewhart …

The majority of the existing literature on simultaneous control charts, ie control charting
mechanisms that monitor multiple population parameters such as mean and variance on a …

Abstract The $\overline {x} $ control chart for the process mean and either the R or s control
chart for the process dispersion have been used together to monitor the manufacturing …

Control charts are used to distinguish between chance and assignable causes in the
variability of quality characteristics. When a control chart signals that an assignable cause is …

The chart is used to monitor the process mean while range (R) and S charts are used to
monitor the process standard deviation. But when it is required to monitor the changes in …

Abstract The Kullback–Leibler information (KLI) control chart is a statistical control chart in
which a degree of difference between in‐control condition and present condition in a …