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 MTLSTD-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 MIGSTD-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.