Title: Developing a skip-lot zero defect sampling plan: what are the main issues?

Authors: R.T. Crossfield, B.G. Dale

Addresses: Yarsley Quality Assured Firms, Oldham, Greater Manchester, UK. ' Manchester School of Management, UMIST, Manchester, UK

Abstract: This paper outlines the main findings of work carried out in the development and application of a combined skip-lot and zero defect sampling plan in first-line supplier of a high integrity product to the motor industry. Amongst the outcomes are: this type of sampling plan has proved to be an effective means of reducing the inspection of not only incoming goods but also on parts produced on the host company|s internal manufacturing processes; some 60% of the host company|s supplier plans were able to go immediately onto this plan: in-house controls on supplied plans should be reduced in a gradual manner; and the plan must be supported by the use of SPC, FMEA and supplier development activities. It is also pointed out that: supplier controls, supplier education, identification and monitoring of supplied material, and customer-supplier communication links are key features, along with supplier performance, which determines the rate at which inspection activities can be removed from incoming batches of product.

Keywords: acceptable quality levels; goods received notes; sample size; skip-lot; zero defects; sampling planning; automobile industry; automotive inspection.

DOI: 10.1504/IJVD.1991.061695

International Journal of Vehicle Design, 1991 Vol.12 No.5/6, pp.489 - 501

Published online: 27 May 2014 *

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