按属性验收取样规程.每百万不合格产品中规定的质量等级

[中文适用范围]： 本国际标准规定，对于以每百万件不合格品数表示的质量水平，估计单个实体（例如批次）质量水平的程序，以及当生产过程处于统计控制中时，根据以下条件估计过程质量水平的程序：来自多个样本的证据。 还指定了在选择合适的抽样计划时使用此信息的程序，以验证给定批次的质量水平不超过规定的限制质量水平（LQL）。 对于没有先前样本数据的情况，给出了在选择计划时推测过程质量水平的指导。 [外文原描述]： ISO 28597:2017 specifies, for quality levels expressed as nonconforming items per million items, procedures for estimating the quality level of a single entity (e.g. a lot) and, when the production process is in statistical control, for estimating the process quality level based on evidence from several samples. Procedures are also specified for using this information when selecting a suitable sampling plan so as to verify that the quality level of a given lot does not exceed a stated limiting quality level (LQL). For the case where no prior sample data is available, guidance is given for presuming a process quality level in selecting a plan.