Developing a skip-lot zero defect sampling plan: what are the main issues? Online publication date: Tue, 27-May-2014
by R.T. Crossfield, B.G. Dale
International Journal of Vehicle Design (IJVD), Vol. 12, No. 5/6, 1991
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.
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