Control charts have two general uses in an improvement project. Undeniably, the most common application is as a tool to monitor process stability and control. A less common, although some might ...

Quality Control (QC) laboratories are responsible for Stage 3 in the lifecycle of analytical procedures, Continued Procedure Performance Verification. In the lifecycle approach, the QC laboratory ...

A quality control chart is a graphic that depicts whether sampled products or processes are meeting their intended specifications.

Control charts usually present a graphic display of process stability and/or instability with time, from which the you can determine mean and standard deviation.

Traditional statistical process control charts assume that observations are independent and normally distributed about some mean. We investigate the robustness of traditional charts to data ...