![]() ![]() ISO 2859-3 states the above in 5.1.1 Requirements for supplier qualification: ![]() Under these conditions, we can use the record of previous inspections as a means of reducing the amount of inspection on any given lot. The consumer must have confidence in the supplier not to pass a substandard lot even though other lots are of acceptable quality.The consumer should not expect that any lot is any worse than any of the immediately preceding lots.We expect these lots to be of the same quality.The lot should be one of a continuing series of lots.In general, such plans require certain assumptions to be met regarding the nature of the inspection process: The reduction in inspection effort is achieved by determining at random, with a specified probability, whether a lot presented for inspection will be accepted without inspection.Ī skip-lot sampling plan is also known as a cumulative results plan. ![]() The purpose of these procedures is to provide a way of reducing the inspection effort on products of high quality submitted by a supplier who has a satisfactory quality assurance system and effective quality controls. ISO 2859-3 states this in the beginning as: The general idea of skip-lot sampling is to reduce the number of times incoming lots inspected due to exceptional quality on behalf of the supplier. Lead Delegate to Subcommittee 5 on Acceptance Sampling and Quality Press author. Here are two questions on product qualification related to clause 5.2.1 Generic requirements for product qualification.ī) The product shall not have any critical classes of nonconforming items or nonconformities.įirst, my understanding is that the risk level with any potential failure or nonconforming of the product should be low to customer - is this correct? Second, if a candidate product carries some critical features (dimension of mechanical product), but also carries a number of low risk features, can we apply the skip lot concept only to the non-critical features? And continue to perform lot-by-lot inspection with critical features? We are concerned the definition of “product” in the standard is a generic term and could be interpreted as feature of a physical product.Ĭ) The specified AQL(s) shall be at least 0,025 %.ĭoes this mean the AQL value should be less than or greater than 0.025%? I assume “greater.” In our company, the most often used is AQL 1.0 and AQL 2.5, which I think meets the requirement.Ī: My name is Dean Neubauer and I am the U.S. Q: Our quality team is trying to improve inspection efficiency and enhance supplier management by employing ISO 2859-3:2005 Sampling procedures for inspection by attributes - Part 3: Skip-lot sampling procedures. ![]()
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