ISO 2859-4:2002 计数检查的抽样程序-第四部分：规定质量水平的评价程序.

标准编号：ISO 2859-4:2002

中文名称：计数检查的抽样程序-第四部分：规定质量水平的评价程序.

英文名称：Sampling procedures for inspection by attributes — Part 4: Procedures for assessment of declared quality levels

发布日期：2002-08

标准范围

ISO 2859-4:2002建立了抽样计划和程序，可用于评估实体（批次、过程等）的质量水平是否符合声明值。制定抽样计划的目的是为了获得与正确申报的质量水平相矛盾的小于5%的风险。风险是10%的不符合与限定质量比相关的不正确的申报质量水平。提供了与三个级别的鉴别能力相对应的抽样计划。与ISO 2859其他部分中的程序相比，ISO 2859-4:2002中的程序不适用于批次验收评估。一般来说，评估程序中得出错误结论的风险平衡不同于验收抽样程序中的平衡。ISO 2859-4:2002可用于各种形式的质量检验，在这种情况下，通过检验样品来提供符合某些声明质量水平的客观证据。该程序适用于允许从实体中随机抽取单个项目样本的实体，如批次、过程输出等。ISO 2859-4:2002中提供的抽样计划适用于但不限于各种产品的检验，如最终产品、组件和原材料、操作、过程中材料、储存中的物资、维护操作、数据或记录以及管理程序。这些程序主要用于感兴趣的数量是不合格项目的数量或分数时，对于这些不合格项目，检验项目被归类为合格或不合格。对于微小的变更，当关注的数量是不合格数量或每个项目的不合格数量时，也可以使用该程序。必要的变更是将“不合格项数”替换为“不合格项数”，将“不合格项百分比”替换为“每100项不合格项数”。

ISO 2859-4:2002 establishes the sampling plans and the procedures that can be used to assess whether the quality level of an entity (lot, process, etc) conforms to a declared value. The sampling plans have been devised so as to obtain a risk of less than 5 % of contradicting a correct declared quality level. The risk is 10 % of failing to contradict an incorrect declared quality level that is related to the limiting quality ratio. Sampling plans are provided corresponding to three levels of discriminatory ability.In contrast to the procedures in the other parts of ISO 2859, the procedures in ISO 2859-4:2002 are not applicable to acceptance assessment of lots. Generally, the balancing of the risks of reaching incorrect conclusions in assessment procedures will differ from the balancing in the procedures for acceptance sampling.ISO 2859-4:2002 may be used for various forms of quality inspection in situations where objective evidence of conformity to some declared quality level is to be provided by means of inspection of a sample. The procedures are applicable to entities such as lots, process output, etc. that allow random samples of individual items to be taken from the entity.The sampling plans provided in ISO 2859-4:2002 are applicable, but not limited, to inspection of a variety of products such as end items, components and raw materials, operations, materials in process, supplies in storage, maintenance operations, data or records, and administrative procedures.The procedures are primarily intended to be used when the quantity of interest is the number or fraction of nonconforming items, for which the inspected items are classified as conforming or nonconforming.With minor changes, the procedures may also be used when the quantity of interest is the number of nonconformities or number of nonconformities per item. The necessary changes are the replacement of the "number of nonconforming items" by the "number of nonconformities" and the replacement of the "percent nonconforming items" by the "nonconformities per 100 items".

标准预览图