Defects and Alter
What is AQL? How to Read and Use AQL Chart?
Before receiving garments from the factory, the buyer does a final inspection of the finished goods. As garments
quantity is high, it is not possible to inspect all garments items. So for that
inspection is done on the basis of sampling by a standard procedure. AQL is
considered as the standard inspection procedure tool for the final acceptance
of finished goods. It is will article we will learn details about AQL.
Definition of AQL
AQL stands for Acceptable Quality
Level. It is the maximum number of allowable defective items, beyond which a
batch is rejected during the inspection.
It also can be defined as the maximum
allowable percentage of defective items, beyond which a batch is rejected during
the inspection.
For Example, AQL is 2% for a lot
means, maximum 2% defective items are allowed to accept this lot like a good
quality.
AQL Table
The inspection procedure is done by
following an AQL table. This is developed and used by the American Military. Now
this table is widely used to inspection in the production industry to accept/reject
the lot/batch.
AQL table holds the lot or batch
size, sampling size code, sampling size and value of the acceptable quality level
for different lot or batch.
An AQL table is given follow for the
final shipment inspection procedure. The AQL level can vary from buyer to buyer and
product to product.
How to Read the AQL table?
The reading procedure of AQL table
is describe below.
Lot Size or Batch size
This value range means how many
items is going to be checked or inspected. Say for example if you offer 750
pieces garments to inspect, the lot or batch size for this quantity will be 501
– 1200 (Code – K).
Sample size Code
The code represents the range of
batch size. Say for example Code – “K” means the lot size is the range of 1201 -
3200
Sample size
It is the number of items will
picked up for the final inspection from the offered batch.
Ac (Accepted)
This is the maximum number of
defective items up to that batch will be accepted to shipment.
Re (Rejected)
This is the minimum number of
defective items from that batch will be rejected to shipment.
The value 2.5, 4 and 6.5 represents AQL system
by which the inspection will be done. This value is pre-contacted with buyer and
supplier before place an order.
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Nicely described
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