There is a single observation for each batch. The variable BATCH identifies the subgroup sample and is referred to as the subgroup-variable. The variable FAIL contains the number of nonconforming ...

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 ...

This is a preview. Log in through your library . Abstract A model is developed for production processes which have an in-control state and may jump to one of several out-of-control states in course of ...

This example shows how you can apply tests for special causes to make np charts more sensitive to special causes of variation. The following statements create a SAS data set named CIRCUIT3, which ...

Control charts have two general uses in an improvement project. Undeniably, the most common application is as a tool to ...