ISO 2859-5:2005 计数检查的抽样程序 第5部份： 由批量检验用认可的质量极限 （AQL）标引的取样品计划系统

标准编号：ISO 2859-5:2005

中文名称：计数检查的抽样程序 第5部份： 由批量检验用认可的质量极限 （AQL）标引的取样品计划系统

英文名称：Sampling procedures for inspection by attributes — Part 5: System of sequential sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection

发布日期：2005-06

标准范围

ISO 2859-5:2005包含序贯抽样方案，该方案补充了ISO 2859-1验收抽样系统的属性检验，由此，供应商通过批次不验收的经济和心理压力，可以维持至少与规定验收质量限值相同的过程平均值，同时，为消费者接受偶尔出现的劣质商品的风险提供上限。ISO 2859-5:2005中定义的抽样方案适用于但不限于:终产品、部件和原材料、操作、过程中的材料、储存中的物资、维护操作、数据或记录以及管理程序的检验。这些方案旨在应用于连续系列的批次，即足够长的系列，以允许应用所述切换规则。这些转换规则规定:a）如果质量出现恶化，则加强对消费者的保护（通过收紧抽样检查标准或停止抽样检查）；以及b）责任机构自行决定减少检验成本（通过降低抽样检验标准）的激励措施应随着时间的推移始终表现出良好的质量。个别抽样计划的设计不适用于其提出的方案之外。如果批次是单独生产的，或系列太短，不适用ISO 2859-5:2005，建议用户咨询ISO 2859-2以获得适当的抽样计划。

ISO 2859-5:2005 contains sequential sampling schemes that supplement the ISO 2859-1 acceptance sampling system for inspection by attributes, whereby a supplier, through the economic and psychological pressure of lot non-acceptance, can maintain a process average at least as good as the specified acceptance quality limit, while at the same time provide an upper limit for the risk to the consumer of accepting the occasional poor lot.The sampling schemes defined in ISO 2859-5:2005 are applicable, but not limited, to the inspection of: end items, components and raw materials, operations, materials in process, supplies in storage, maintenance operations, data or records, and administrative procedures.These schemes are designed to be applied to a continuing series of lots, that is, a series long enough to permit the described switching rules to be applied. These switching rules provide: a) enhanced protection to the consumer (by means of tightened sampling inspection criteria or discontinuation of sampling inspection) should deterioration in quality occur; and b) an incentive, at the discretion of the responsible authority, to reduce inspection costs (by means of reduced sampling inspection criteria) should consistently good quality be demonstrated over time.The individual sampling plans are not designed to be applicable outside of the schemes in which they are presented. If lots are produced in isolation or in a series too short for ISO 2859-5:2005 to apply, the user is advised to consult ISO 2859-2 for appropriate sampling plans.

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