Do you want to ensure that nearly all lots meet or accede the customer requirement? Or do you simple want to ensure that the customer's sampling plan won't reject too many shipments?Ĭlick to expand.Yes and no. I.e, when you sample, you will accept most (say 90% to 99%) of lots with the specified AQL.Īs a producer doing sampling, you need to decide your goal. The ASQ Z1.4 (MIL-STD-105E) tables are generally set up for situation 3. In case 3, you might get away with 0.12 dphu and still have most of the lots accepted. In case 2, you would aim for 0.08 (or a little less) dphu in order to avoid getting too many rejected lots back from the customer. In case 1, you might need to aim for 0.04 dphu in order to avoid getting too many rejected lots back from the customer. The required quality required from the producer also varies widely. The sampling plan used by a customer would vary greatly depending on which situations was the case.
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Click to expand.I can think of at least three ways to interpet this goal, and this interpretation has a big affect on the sampling you do:ġ) The customer will accept no more than 0.08 dphu and will reject most lots that are any worse than 0.08 dphu.Ģ) The customer will accept an average of 0.08 dphu and will lots as long as the average doesn't get above about 0.08 dphu.ģ) The customer will accept 0.08 dphu and will accept most lots that are no worse than 0.08 dphu.