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 ration (see clause 4). Sampling plans are provided corresponding to three levels of discriminitory 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.