ISO 28597:2017 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.
Status: PublishedPublication date: 2017-10
Edition: 1Number of pages: 19
Technical Committee: ISO/TC 69/SC 5 Acceptance sampling
- ICS :
- 03.120.30 Application of statistical methods
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