关于Z1。4-2003（R2018）:按属性检验的抽样程序和表格是一种验收抽样系统，与规定AQL的连续批次上的切换规则一起使用。它提供了严格、正常和精简的计划，用于每100个单元的不合格或不合格百分比的属性检查。关于Z1。9-2003（R2018）:不合格百分比的变量检验抽样程序和表格是一种验收抽样系统，用于规定AQL的连续批次。它提供了用于正态分布测量的紧缩、正常和缩减计划。变化可以通过样品标准偏差、样品范围或已知标准偏差来测量。 仅当测量值的正常性得到保证时才适用。

About Z1.4-2003 (R2018):Sampling Procedures and Tables for Inspection by Attributes is an acceptance sampling system to be used with switching rules on a continuing stream of lots for AQL specified. It provides tightened, normal, and reduced plans to be applied for attributes inspection for percent nonconforming or nonconformities per 100 units.About Z1.9-2003 (R2018):Sampling Procedures and Tables for Inspection by Variables for Percent Nonconforming is an acceptance sampling system to be used on a continuing stream of lots for AQL specified. It provides tightened, normal, and reduced plans to be used on measurements which are normally distributed. Variation may be measured by sample standard deviation, sample range, or known standard deviation. It is applicable only when the normality of the measurements is assured.