Control Chart and Detection Power Enhancement Procedure for the Monitoring of the Logistic Distribution Process Capability

Document Type : Research Paper

Authors

1 Associate Professor, Industrial Engineering Department, Faculty of Industrial Technologies, Urmia University of Technology, Urmia, Iran

2 PhD Student, Industrial Engineering Department, Faculty of Engineering, Karabuk University, Karabuk, Turkey

Abstract

Process capability measures the uniformity and repeatability of a process with regard to customer requirements and product specifications. Developing control charts for the capability of a process offers a more comprehensive way to monitor the process performance. In this research, a control chart is developed for the process capability of processes that follow Logistic distribution. In this control chart, process yield is monitored based on the process distribution parameters. A procedure is proposed to enhance the detection power of the control chart. The advantage of the proposed control chart is its ability to simultaneous monitoring of process distribution parameters. The performance of the control chart is evaluated through simulation experiments based on the average run length (ARL) and standard deviation of run length (SDRL) indices. According to simulation results, the proposed control chart can effectively detect out-of-control conditions.

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Main Subjects


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