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 ...

Youíll learn how to select the right attribute data control chart, and how to create those control charts. These include the NP Chart, the P Chart, the U Chart and the C Chart. To do this you must ...

The control chart basics.2 types of variation and how we distinguish between common and special cause variation, along with how to create a rational subgroup. We also cover the equations and constants ...

Control charts that are properly constructed and maintained prevent false out-of-control signals and provide a useful method for monitoring a process.

The following statements create a p chart displaying both sets of control limits: title 'p Chart with Revised Limits for Failed Circuits'; symbol v=dot c=salmon; proc shewhart data=circ_one ...

Process inspection schemes using control charts with warning lines are considered and the properties for some schemes based on the observations from the last few samples are evaluated. Tables of ...

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 ...