An attributive inspection (OK or not OK) is an acceptance sampling inspection. This means that the number of nonconforming units or the number of defects in a sample determines the acceptability of the inspection lot. ISO 2859 serves as a standard for attributive inspections. The Quality Management component has two valuation procedures for attributive inspections:

• Attributive inspection based on nonconforming units
• Attributive inspection based on the number of defects

For an attributive inspection, you determine the number of defects or the number of nonconforming units per sample size. Depending on the recording form, you either enter the results or the system determines these results from the single values.

The inspection result is compared with the acceptance number and the rejection number for the characteristic in question. The inspection characteristic is accepted if the number of defects or the number of nonconforming units does not exceed the acceptance number. The characteristic is rejected when the rejection number is reached or exceeded. If the result falls between the acceptance number and the rejection number, the characteristic is accepted (but rejected for the dynamic modification valuation).

An attributive valuation is also possible when the rejection number is reached with a smaller sample size or when the acceptance number is not exceeded with a larger sample size. In all other situations, you must use the sample size defined in the sampling plan.