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Beyond Taguchi’s Concept of the Quality Loss Function
Dr. Genichi Taguchi looked at quality in a broader term and gave an excellent definition of quality in terms of loss to society. However the scope of this definition is limited to the losses imparted by a poor quality product to the customer only and are considered during the useful life of the product and further in a certain situation this loss can even be zero. In this paper, it has been proposed that the scope of quality of a product shall be further enhanced by considering the losses imparted by a poor quality product to society at large, due to associated environmental and safety related factors, over the complete life cycle of the product. Moreover, though these losses can be further minimized with the use of techno-safety interventions, the net losses to society however can never be made zero. This paper proposes an entirely new approach towards defining product quality and is based on Taguchi’s definition of quality.
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[1] James R. Evans, William M. Lindsay, Managing for Quality and Performance Excellence, Cengage Learning, USA, 2016, cp. 7.
[2] G. Taguchi, Introduction to Quality Engineering: Designing Quality Into Products and Processes, Asian Productivity Organisation, Tokyo, 1986.
[3] Jeh-Nan Pan, Jianbiao Pan, A Comparative Study of Various Loss Functions in the Economic Tolerance Design, IEEE International Conference on Management of Innovation and Technology, 2006, pp 783-787.
[4] Naresh K. Sharma, Elizabeth A. Cudney, Quality Loss Function – A Common Methodology for Three Cases, Journal of Industrial and Systems Engineering, Vol. 1, No. 3, pp 218-234, 2007.
[5] Dale H. Besterfield, Total Quality Management, Addison Wesley Longman Publishers: Singapore, First Indian Reprint, 2001, cp 14.
[6] Philip B, Crosby, Quality is Free, McGraw Hill Publishers: New York, 1979.
[7] Phillip J, Ross, Taguchi Techniques for Quality Engineering, McGraw-Hill Book Company, 1988, cp. 1.
[8] David A. Collier, James R. Evans, Operations Management, Cengage Learning, USA, 2009, pp 99.
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