The extent to which products meet specifications needs to be systematically monitored in a production process. Product quality will typically be defined by two quantities: deviations from stated ...

We invite you to consult the fact sheet on Statistical quality control: the concept of process centring and dispersion [FIC 0562] for : remind you of the concepts of statistical dispersion of values, ...

A "deviation" in manufacturing is when manufacturing steps are changed in some way from the set guidelines. Production guidelines are very detailed based on supply contract specifications, product ...

Power plants–especially coal-fired boilers–pose a set of process control problems unparalleled in other industries. Rapid load ramps, continuous unit demand changes, variable fuel quality and process ...

_MEAN_ process mean (value of central line on box chart) _R_ value of central line on R chart _S_ value of central line on s chart A subgroup standard deviation variable is included if you specify the ...

You can read raw data (process measurements) from a DATA= data set specified in the PROC SHEWHART statement. Each process specified in the SCHART statement must be a SAS variable in the DATA= data set ...

This article applies the basics of stability, performance, and capability to modern process performance and capability indices. Performance metrics for processes are an area of much regulatory ...