Here is a few
definitions that may assist you:
Acceptable Quality Level (or Assured Quality Level)
The AQL is the
quality level which is the limit of a satisfactory process average
(in other words, a standard is set, if you do not meet the standard
you fail the inspection). A sampling plan and an AQL are selected
in accordance with the risk assumed. The inspection will be
approved only if the defects in the batch or lot be no greater then
the designated value of the AQL sampling plan.
Sample : a sample consists of one or more units of product
drawn from a lot or batch. The unit of the sample being selected at
random without regard to the quality. The number of units of
product in the sample is the AQL sample size.
Sampling Plan : a sampling plan indicates the number of
units of product from each lot or bach which are to be inspected and
the criteria for determining the acceptability of the lot or batch.
of Product : the unit of product is the item inspected in
order to determine its classification as defective or
non-defective. In other words the item used to count the number of
defects. It may be a single item such as a shirt or a set such as
two piece pajama. Or the unit can be a length of fabric etc. The
unit of product is any item that you wish to inspect.
average is the average percent defective or average number of
defects per hundred units of product committed by the supplier for
original inspection. The original inspection is the first
inspection of a particular quantity of product as distinguished from
the inspection of product which has been resubmitted after prior