A hybrid OLAP-association rule mining based quality management system for extracting defect patterns in the garment industry

Authors:
C. K. H. Lee;K. L. Choy;G. T. S. Ho;K. S. Chin;K. M. Y. Law;Y. K. Tse
Affiliations:
Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong;Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong;Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong;Department of Systems Engineering and Engineering Management, City University of Hong Kong, Hong Kong;Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong;The York Management School, University of York, United Kingdom
Venue:
Expert Systems with Applications: An International Journal
Year:
2013

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Abstract

In today's garment industry, garment defects have to be minimized so as to fulfill the expectations of demanding customers who seek products of high quality but low cost. However, without any data mining tools to manage massive data related to quality, it is difficult to investigate the hidden patterns among defects which are important information for improving the quality of garments. This paper presents a hybrid OLAP-association rule mining based quality management system (HQMS) to extract defect patterns in the garment industry. The mined results indicate the relationship between defects which serves as a reference for defect prediction, root cause identification and the formulation of proactive measures for quality improvement. Because real-time access to desirable information is crucial for survival under the severe competition, the system is equipped with Online Analytical Processing (OLAP) features so that manufacturers are able to explore the required data in a timely manner. The integration of OLAP and association rule mining allows data mining to be applied on a multidimensional basis. A pilot run of the HQMS is undertaken in a garment manufacturing company to demonstrate how OLAP and association rule mining are effective in discovering patterns among product defects. The results indicate that the HQMS contributes significantly to the formulation of quality improvement in the industry.