GB/T 8051-2002 in English

《GB/T 8051-2002计数序贯抽样检验程序及表》由TC21（全国统计方法应用标准化技术委员会）归口，主管部门为国家标准化管理委员会。
本标准规定了离散个体的计数序贯抽样检验方案与程序。本标准主体中的方案由生产方风险点与使用方风险点为索引。作为对于GB/T 2828（ISO 2859-1）抽样方案系统的补充，在附录A中规定了以可接受质量水平（AQL）为索引的记数序贯抽样检验方案与程序。本标准的目的是提供对检验结果的序贯评定程序，使用此程序可通过拒受劣质批给生产方带来的经济和心理上的压力，促使生产方提供具有高概率接受质量的批。同时，给接受劣质批的概率规定一个上限，使得使用方也受到保护。本标准指定的抽样方案，可用于但不限于以下不同的检验场合，例如：――最终产品；――部件和原材料；――操作；――在制品；――库存物资；――维修操作；――数据或记录；――管理程序。本标准的方案抽样方案可用于不合格程度用不合格品率（或不合格品百分数）或每单位产品不合格数（或每百单位产品不合格数）来表示的情况。抽样检验方案基于不合格品为随机发生并统计独立的假设。也许有确实的理由怀疑样品的某个不合格是由于可能同时导致其它不合格的条件引起，如果这样的话，更好的方法是考虑这个样品是合格品还是不合格品，而忽略多重不合格的情况。附录A中的方案主要适用于检验同一条生产线上的连续系列批，本标准主体中的方案也可以用来检验孤立批。

Scope

This standard specifies the counting sequential sampling inspection scheme and procedure for discrete individuals. The schemes in the main body of this standard are indexed by producer risk points and user risk points. As a supplement to the sampling plan system of GB/T 2828 (IS0 2859-1), appendix A stipulates the counting sequential sampling inspection plan and procedure indexed by the acceptable quality level (AQL). T The purpose of this standard is to provide a sequential assessment procedure for inspection results, the use of which will induce the manufacturer to provide lots with a high probability of acceptance quality through the economic and psychological pressure on the producer to reject inferior lots. At the same time, an upper limit is set for the probability of receiving inferior batches, so that the user is also protected. The sampling plan specified in this standard can be used but not limited to the following different inspection occasions, for example: - final products; - components and raw materials; - operations; - work in progress; - inventory materials; - maintenance operations; - data or records; - management procedures. The sampling plan of this standard can be used when the degree of nonconformity is expressed by the rate of nonconforming products (or percentage of nonconforming products) or the number of unqualified products per unit (or the number of unqualified products per hundred units). The sampling inspection plan is based on the assumption that nonconforming products occur randomly and are statistically independent. There may be good reason to suspect that a failure of a sample is due to conditions that may have caused other failures at the same time. If so, it is better to consider the sample as a conforming or rejecting product and ignore multiple failures. Condition. The scheme in Appendix A is mainly applicable to the inspection of continuous series of batches on the same production line. The scheme in the main body of this standard can also be used to inspect isolated batches.