BS ISO 28597:2017

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
4 General principles
5 Estimation of quality levels in nonconforming items
  per million items
6 Lot acceptance sampling requirements and procedures
7 Single sampling plans indexed by LQL in nonconforming
  items per million items
Annex A (normative) - Data exclusion
Annex B (informative) - Underlying theory for
        generating point estimates of quality leveling
        fraction nonconforming
Annex C (informative) - Statistical theory and calculation
        of Table 1
Bibliography

Describes, for quality levels expressed as nonconforming items per million items, procedures for estimating the quality level of a single entity (e.g. a lot) and, when the production process is in statistical control, for estimating the process quality level based on evidence from several samples.

This International Standard specifies, for quality levels expressed as nonconforming items per million items, procedures for estimating the quality level of a single entity (e.g. a lot) and, when the production process is in statistical control, for estimating the process quality level based on evidence from several samples. Procedures are also specified for using this information when selecting a suitable sampling plan so as to verify that the quality level of a given lot does not exceed a stated limiting quality level (LQL). For the case where no prior sample data is available, guidance is given for presuming a process quality level in selecting a plan.