基于非零验收数的传统属性抽样计划不再可取。此外，现在重点放在客户收到的质量水平上。这与批次公差百分比缺陷（LTPD）值或MIL-STD-105的有限质量保护直接相关。以不合格百分比衡量质量水平虽然并非不正确，但已被以百万分率(PPM)衡量的质量水平所取代。因此，该标准满足了对抽样计划的需求，该计划可以增强MIL-STD-105，基于零验收号，并解决百万分之一范围内的质量（不合格）水平。本文件不涉及轻微不合格，轻微不合格被定义为不太可能显著降低产品单元预期用途可用性的不合格。

Conventional attribute sampling plans based upon nonzero acceptance numbers are no longer desirable. In addition, emphasis is now placed on the quality level that is received by the customer. This relates directly to the Lot Tolerance Percent Defective (LTPD) value or the Limiting Quality Protection of MIL-STD-105. Measuring quality levels in percent nonconforming, although not incorrect, has been replaced with quality levels measured in parts per million (PPM). As a result, this standard addresses the need for sampling plans that can augment MIL-STD-105, are based upon a zero acceptance number, and address quality (nonconformance) levels in the parts per million range. This document does not address minor nonconformances, which are defined as nonconformances that are not likely to reduce materially the usability of the unit of product for its intended purpose.