| The c-chart is a type of
attribute
control chart
that is used to plot the number of nonconformities
per unit when the sample size is constant.
The control limits are:
| Upper
Control Limit |
|
| Lower
Control Limit |
|
 |
the average number of conformities
per unit. |
The c-chart is used to deal with situations
where each unit can have several nonconformities.
This is distinct from the np
chart, which is used when units
are either conforming or not.
|
