An Inspection Level is classified into a desktop inspection (review of the inspection report or result), visiting (witness) and resident inspection. In ISO 2859, General Inspection Level (GI): Level I (Low sampling, suitable for very good quality levels); Level II (Normal sampling, suitable for normal quality levels); Level III (High sampling, suitable for lower quality levels). The Inspection level is a part of statistical sampling plans, which are used to determine the number of units to inspect and the criteria for acceptance or rejection based on the results of the inspection.
Reference Definition by ISO: ISO 2859-4:2020 - Sampling procedures for inspection by attributes: This document establishes single sampling plans for conformance testing, i.e., for assessing whether the quality level of a relevant audit population (lot, process, inventory, file etc) conforms to a declared value. Sampling plans are provided corresponding to four levels of discriminatory ability. The limiting quality ratio (LQR) (see Clause 4) of each sampling plan is given for reference. For levels I-III, the sampling plans have been devised so as to obtain a risk no more than 5 % of contradicting a correct declared quality level. The risk of failing to contradict an incorrectly declared quality level which is related to the LQR is no more than 10 %. The sample sizes for level 0 are designed in a way that the LQR factors of the sampling plans are compatible with the LQR factors for level I.
Related Definitions in the Project: The Quality Management; Construction; Procurement
