Standard No.:	GB/T 2828.4-2008
English Name:	Sampling procedures for inspection by attributes - Part 4: Procedures for assessment of declared quality levels
Chinese Name:	计数抽样检验程序 第4部分：声称质量水平的评定程序
Chinese Classification:	A41    Mathematics
Professional Classification:	GB    National Standard
ICS Classification:	03.120.30 03.120.30    Application of statistical methods 03.120.30
Source Content Issued by:	SAC
Issued on:	2008-7-28
Implemented on:	2009-1-1
Status:	valid
Superseding:	GB/T 14437-1997 Single sampling procedures and tables by attributes for product quality audit GB/T 14162-1993 Sampling procedures and tables for product quality audit(Apply to inspection by attributes for nonconformities per hundred units)
Target Language:	English
File Format:	PDF
Word Count:	14950 words
Translation Price(USD):	598.0
Delivery:	via email in 1~5 business day

GB/T2828的本部分所规定的抽样方案和评定程序,用于评定某一总体(批或过程等)的质量水平是否符合某一声称质量水平。设计这些抽样方案是为了使否定某一合格总体(批)的风险控制在5%,使不否定实际质量水平为声称质量水平的LQR 倍的不合格总体(批)(见第4 章)的风险为10%。GB/T2828的本部分提供了4个判别水平的抽样方案。与GB/T2828的其他部分的程序不同,本部分的程序不可用于批的验收抽样。GB/T2828的本部分可用于各种形式的质量核查。包括利用样本的检验结果来说明某一核查总体是否符合某一声称质量水平的场合。GB/T2828的本部分适用于允许从核查总体中抽取由一些单位产品组成的随机样本的情形。GB/T2828的本部分提供的抽样方案可用于(但不限于)检验下述各种产品,例如:---最终产品;---零部件和原材料;---操作;---在制品;---库存品;---维修操作;---数据或记录;---管理程序。本部分主要用于,当把所检验的单位产品划分为合格品和不合格品时,核查总体中的不合格品的个数或不合格品率的情形。对于不合格数或每百单位产品不合格数的情形,经稍做变动也可使用本部分,这些必要的变动是:---以不合格数代替不合格品数;---以每百单位产品不合格数代替不合格品百分数(或每百单位产品不合格品数)。此时,表2至表9中给出的表值仅为近似值。本部分表2至表9中给出的表值是用二项分布计算出的。当核查总体量小于250时,或核查总体量与样本量之比大于10时,则由本部分检索出的抽样方案是近似的。可按GB/T15482中规定的方法确定抽样方案。

Contents Foreword i Introduction iii 1 Scope 2 Normative References 3 Terms, Definitions and Symbols 3.1 Terms and Definitions 3.2 Symbols and Abbreviations 4 Principles 5 Declared Quality Level (DQL) 6 Sampling Plans 6.1 LQR (Limiting Quality Ratio) Level 6.2 Selection of a Sampling Plan 7 Sampling Inspection Procedures Implementation 7.1 Audit Population Determination 7.2 Technical Performance, Quality Characteristic and Requirements Determination for Unit Product 7.3 Nonconforming Item Classification Determination 7.4 Declared Quality Level Specification 7.5 LQR Level Specification 7.6 Sampling Plan Index 7.7 Sample Selection 7.8 Sample Inspection 7.9 Disposition of Nonconforming Items 7.10 Judgment Criteria 7.11 Repeat Test or Inspection 8 Further Information 8.1 Curves Showing Approximate Probability of Contradiction 8.2 Tables Indicating Discriminatory Ability Appendix A (Normative) Situation for Declared Quality Level DQL Equal to Appendix B (Informative) Examples of Use of the Procedures Appendix C (Informative) Revision Explanation for ISO 2859-4: Bibliography