What is the purpose of using AQL (Acceptable Quality Level) for Sampling?

A

Adam G

#1
Hello,
Can someone explain me what is the purpose of using AQL? Surely i miss something here.... Having sampling plan AQL 1.0 i have 95% probability that i will accept lots defective in 1% and this is the maximum defectiveness i agreed with supplier.

But if supplier will ship lot defective in 25% most probably my sampling plan will also accept that batch.

So AQL in general is not securing customer but Supplier. If that's the case then isn't it better not to use sampling plan at all? Then i have 100% probability i will accept 1% defective lot ;)

What is understand secures me as Customer is LTPD but that's quite different story and different sampling plan...
 
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H

hvast_

#4
Hello,
Can someone explain me what is the purpose of using AQL? Surely i miss something here.... Having sampling plan AQL 1.0 i have 95% probability that i will accept lots defective in 1% and this is the maximum defectiveness i agreed with supplier.

But if supplier will ship lot defective in 25% most probably my sampling plan will also accept that batch.

So AQL in general is not securing customer but Supplier. If that's the case then isn't it better not to use sampling plan at all? Then i have 100% probability i will accept 1% defective lot ;)

What is understand secures me as Customer is LTPD but that's quite different story and different sampling plan...
everything depends of level AQL. AQL it is only conventional method of control, which more protect cost whether keep quality level of raw material provide by supplier.

Front point of view customer you can't allow to 100 % control material from your supplier- I believe that you know.
From Quality point of view will be better than we can control 100%, but you know- it's related with cost which give additional value.
In my opinion AQL it is only compromise between cost and quality, between supplier and customer.
BR/ Tomasz
 
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