Again there is no. Single number of defectives that might be in the lot when you have found zero defects in your sample. I know you want this answer but it isn’t possible. The answer is the OC curves. There is always some probability that there are defects in the lot. The lower the actual defect rate the higher the probability that you will not detect it in your sample. The higher the defect rate the lower the probability that you will not detect it. For example, your plan allows a 5% probability that you will accept a lot with 3.8% defects in it.

How many defects did your Customer find? What quality level does your Customer require?

Thanks a lot to keep responding to for my inquiries so far...

The problem is our customer is using ANSI/ASQ Z1.4, AQL 0.65, so the sampling qty is 300 (Level II & M ) and found 40 pcs with faulty.

lot qty 30000

AQL 0.65

C=5

5=6

I also agree that they reserved the right to reject per ANSI/ASQ Z1.4 STD. Because if I am not wrong per AQL 0.65% with more than 1.6% of rejected part (Round 2%) the lot will be rejected.

As they also not familiar with C=0 sampling plan same like me .....for them no matter what sampling plan we are following but they want to the percentage of defect we are allowing in full lot qty per AQL 0.65, C=0 Sampling plan that's all.

As i cannot get the allowable defective for each and every sampling qty from the table of c=0 sampling plan, for me unable to answer to them, that's the reason I trying here to get an answer for them at the same time to get understand myself.