A Box Cox Transformation is a calculation that rearranges the dataset into a normal distribution. The data must be positive and continuous.
Process Capability & Performance (Pp, Ppk, Cp, Cpk) are indicators of the specification relative to process dispersion and process centering.
Attribute charts display information on defects and defectives. They help you visualize the enemy – variation!
X Bar R charts are the widely used control charts for variable data. They help to examine the process stability in many industries.
An XmR chart (aka Shewhart’s Control Chart aka ImR chart) is a chart where the control limits are calculated from the moving average range.