Process monitoring using successive sampling and a repetitive scheme

Abstract

We propose a repetitive sampling based variable control chart to monitor the process mean by using successive sampling over two occasions. It is assumed that an auxiliary variable is available as well as the main quality characteristic of interest. The average run length (ARL) is derived, which is one of the most useful performance measures to evaluate the performance of a control chart. The chart parameters are determined for the targeted in-control ARL. The proposed control chart exhibits superior performance than a Shewhart-type control chart in terms of early detection of process mean shift. The strategy of the proposed control chart has been implemented on a real industry data. © 2018 KIIE.