ISO 8422:2006 项目检验用序列抽样法

标准编号：ISO 8422:2006

中文名称：项目检验用序列抽样法

英文名称：Sequential sampling plans for inspection by attributes

发布日期：2006-10

标准范围

ISO 8422:2006包含按离散项目属性进行检验的顺序抽样计划和程序。这些计划根据生产者和消费者的风险点编制索引。因此，它们不仅可用于验收抽样，还可用于验证简单的比例统计假设。ISO 8422:2006提供了对检验结果进行顺序评估的程序，该程序可用于通过不接受大量劣质的经济和心理压力，促使供应商提供大量具有高接受概率的质量。同时，消费者接受大量劣质商品的概率有一个规定的上限。ISO 8422:2006提供了适用于但不限于不同领域的抽样计划，例如: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。ISO 8422:2006中的取样计划应主要用于分析从工艺中采集的样品。例如，它们可用于从受统计控制的过程中抽取的批次的验收抽样。然而，当单个批次的尺寸较大且预期不合格分数较小（显著小于10%）时，它们也可用于对其进行验收抽样。对于连续系列批次的验收抽样，应采用ISO 2859-5中公布的逐批检验验收质量限（AQL）索引的顺序抽样计划系统。

ISO 8422:2006 contains sequential sampling plans and procedures for inspection by attributes of discrete items. The plans are indexed in terms of the producer's risk point and the consumer's risk point. Therefore, they can be used not only for the purposes of acceptance sampling, but for a more general purpose of the verification of simple statistical hypotheses for proportions. ISO 8422:2006 provides procedures for sequential assessment of inspection results that may be used to induce the supplier, through the economic and psychological pressure of non-acceptance of lots of inferior quality, to supply lots of a quality having a high probability of acceptance. At the same time, the consumer is protected by a prescribed upper limit to the probability of accepting lots of poor quality.ISO 8422:2006 provides sampling plans that are applicable, but not limited, to inspection of different fields, such as: end items, components and raw materials, operations, materials in process, supplies in storage, maintenance operations, data or records, and administrative procedures.The sampling plans from ISO 8422:2006 should primarily be used for the analysis of samples taken from processes. For example, they may be used for the acceptance sampling of lots taken from a process that is under statistical control. However, they may also be used for the acceptance sampling of an isolated lot when its size is large, and the expected fraction nonconforming is small (significantly smaller than 10%).In the case of the acceptance sampling of continuing series of lots, the system of sequential sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection published in ISO 2859-5 should be applied.

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