Title: Assessing the assembly quality of a T-bar ceiling suspension by using an advanced multi-process performance analysis chart with asymmetric tolerance

Authors: Hsi-Tien Chen; Kuen-Suan Chen

Addresses: Department of Leisure Industry Management, National Chin-Yi University of Technology, No. 57, Sec. 2, Zhongshan Rd., Taiping Dist., Taichung, Taiwan ' Department of Industrial Engineering and Management, National Chin-Yi University of Technology, No.57, Sec. 2, Zhongshan Rd., Taiping Dist., Taichung, Taiwan

Abstract: Process capability indices (PCIs) are highly effective means for assessing the process potential and performance in manufacturing industry. However, the approaches developed for process capability indices (PCIs) can not analyse multi-process products. Some PCIs cause either the problems of sampling error of point estimates or full inspection. This paper aims to develop an advanced multi-process performance analysis chart with asymmetric tolerances (AMPPAC-AT) to assess the process performance of multi-process products. This approach takes into account interval estimates of the PCIs to overcome the shortcomings of full inspection or sampling error of point estimates. It can precisely measure an entire product composed of symmetric tolerances, asymmetric tolerances, larger-the-better, and smaller-the better characteristics. For application study, T-bar ceiling suspension system is handled to demonstrate the implementation process of AMPPAC-AT approach. We believe that our approach helps continuous improvement on overall assembly quality with asymmetric tolerances. [Received 19 March 2015; Revised 25 August 2015; Accepted: 22 September 2015]

Keywords: process capability indices; PCIs; asymmetric tolerances; assembly quality; multi-process products; interval estimates; quality assessment; statistical process control; SPC; control charts; T-bar ceiling suspension.

DOI: 10.1504/EJIE.2016.075857

European Journal of Industrial Engineering, 2016 Vol.10 No.2, pp.264 - 283

Published online: 07 Apr 2016 *

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