Designing of an attribute control chart for two-stage process

Abstract

In practice, the products can be manufactured through several stages. In this manuscript, we will propose an attribute control chart plotting the number of defectives for a two-stage process. The in-control average run length is derived and the out-of-control average run lengths are also analyzed according to the process shifts in the first and/or the second stage process. The tables of the average run lengths are given for various specified parameters. An example is given with synthetic data for the illustration of the proposed control chart.

RETRACTED ARTICLE: Monitoring of production of blood components by attribute control chart under indeterminacy

“…Some of the attribute control charts are p -chart, np -chart, u -chart, and c -chart and the applications of these control charts can be found in different situations. A number of studies are available on attribute control chart designing (see for example 8 – 15 ).…”