Document Type : Original Article

Authors

1 Department of Mechanical and Manufacturing Engineering, Putra Malaysia University, 43400 UPM Serdang, Selangor, Malaysia.

2 Department of Industrial Engineering, Faculty of Engineering , Kharazmi University, Tehran, Iran.

Abstract

Up to now, different tools have been introduced for analyses of process capability such as process capability indexes of Cp, Cpk and Cpm that developed for analyzing the capability of process and adapting the quality specifications of product. Most studies in the literature only consider the process with single capability variable, while there is a lack of studies that consider multi-variable processes. Cpm index has been defined with Taguchi overview over robust design. In this research, the metric Lp model has introduced to investigate the optimum decision variables by considering nominal is better quality specification and reparation Cpm index. We also expand the proposed model for such a processes with considering overall cost as well as process quality. At the end of research, numerical example has been presented to exhibit usage of proposed model for obtaining the best levels of process decision variables.

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