Contents
- Index
Curtailing of Inspection
Curtailing of inspection is when the inspection is stopped short of the required sample size because the accept/reject decision has been determined regardless of the results of the remaining units. For example, suppose the single sampling plan for defective units n=50 and a=1 is being used. If following the inspection of just 10 units, 2 defectives are found, regardless of the results of the remaining 40 units, the lot will be rejected.
Inspection can be curtailed when inspecting for defective units, defects per unit, and defects per quantity. Curtailing can occur on both acceptance and rejection and on each stage of a double or multiple sampling plan.
Curtailing does not affect the protection provided by a sampling plan including the OC curve, AOQ curve, AQL, LTPD, and AOQL. It does reduce the ASN curve. However, despite this benefit, curtailing of inspection is rarely performed because of the added complexity and because it interferes with other uses of the data such as trending.