need guidance on interpretation of the sampling plan tables.
Background / Exclusions :-
* we operating Sample inspection level -II criteria ( thumb rule~ no questions asked on this! at this point of time)
* so viz., for 'lot size' of 3000, 'sample size code' is K
* so, we determine that the no. of samples is 125.
* Critical (0.065) - Major ( 0.25) - Other (1.5)
example for AQL table..https://elsmar.com/elsmarqualityforum/attachments/aqlchart-pdf.24029/
Q1. No. of samples to be selected.
option-1 :- as the AQL table indicates that for critical defects @ 0.065%, we require atleast 200 samples, we proceed to sample 200 and inspect for approving/rejecting
option-2:- as aql table is selected ( even though its an thumb rule at this point of time) we stick to 125 sample inspection for approving/rejecting
counter argument option-1 :- we can explain in certain instances, where more samples as worst case scenario, but same is not true for other scenarios, where samples required although higher, could lead to selection of first sample plan identified under the arrow.
counter argument option-2 :- this will lead to overkill of number of samples to be inspected for higher level of AQL. ( for major and others)..
Q2 :- so, is it acceptable to inspect different sample-sizes for different category of defects. ( viz., critical - major - others)
my opinion.,
different number of samples inspected for different category of defects ( or AQL levels) and we stick to the sample size determined by AQL ( subject to the option-1 only where it is extending the sample size)
Background / Exclusions :-
* we operating Sample inspection level -II criteria ( thumb rule~ no questions asked on this! at this point of time)
* so viz., for 'lot size' of 3000, 'sample size code' is K
* so, we determine that the no. of samples is 125.
* Critical (0.065) - Major ( 0.25) - Other (1.5)
example for AQL table..https://elsmar.com/elsmarqualityforum/attachments/aqlchart-pdf.24029/
Q1. No. of samples to be selected.
option-1 :- as the AQL table indicates that for critical defects @ 0.065%, we require atleast 200 samples, we proceed to sample 200 and inspect for approving/rejecting
option-2:- as aql table is selected ( even though its an thumb rule at this point of time) we stick to 125 sample inspection for approving/rejecting
counter argument option-1 :- we can explain in certain instances, where more samples as worst case scenario, but same is not true for other scenarios, where samples required although higher, could lead to selection of first sample plan identified under the arrow.
counter argument option-2 :- this will lead to overkill of number of samples to be inspected for higher level of AQL. ( for major and others)..
Q2 :- so, is it acceptable to inspect different sample-sizes for different category of defects. ( viz., critical - major - others)
different number of samples inspected for different category of defects ( or AQL levels) and we stick to the sample size determined by AQL ( subject to the option-1 only where it is extending the sample size)
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