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 ...

An expected-cost model is developed for the np-control chart when curtailed sampling procedures are followed. The total expected cost consists of the cost of sampling, the cost of investigating and ...