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ANSI/ISO/ASQ 2859-4:2002: Sampling procedures for inspection by attributes - Part 4: Procedures for assessment of declared quality levels

ANSI/ISO/ASQ 2859-4:2002: Sampling procedures for inspection by attributes - Part 4: Procedures for assessment of declared quality levels

PDF, 24 pages, Published 2008
Item Number: T850E

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Keywords

  • ISO standards

Description

This part of ISO 2859 establishes sampling plans and procedures that can be used to assess whether the quality level of an entity (lot, process, etc) conforms to a declared value. The sampling plans have been devised so as to obtain a risk of less than 5% of contradicting a correct declared quality level. The risk is 10% of failing to contradict an incorrect declared quality level which is related to the limiting quality ratio (see clause 4). Sampling plans are provided corresponding to three levels of discriminatory ability.

In contrast to the procedures in the other parts of ISO 2859, the procedures in this part of ISO 2859 are not applicable to acceptance assessment of lots. Generally, the balancing of the risks of reaching incorrect conclusions in assessment procedures will differ from the balancing in the procedures for acceptance sampling.

This part of ISO 2859 may be used for various forms of quality inspection in situations where objective evidence of conformity to some declared quality level is to be provided by means of inspection of a sample. The procedures are applicable to entities such as lots, process output, etc. that allow random samples of individual items to be taken from the entity.

This second edition cancels and replaces the first edition (ISO 2859-4:1999), which has been technically revised.