Sequential-Sampling Plan can be defined as a further refinement of the double-sampling plan, in which we randomly select items from the lot and inspects them one by one. Each time an item is inspected, a decision is made to accept or to reject the lot. But is there a particular limitation for the number of samples that we can draw out in this method?
https://link.springer.com/article/10.1007/BF01867875
I wonder whether this method is cost-effective.
Yes, the curtailment sample size is just that; the maximum cumulative number of samples for a given sampling plan. If no decision is made and the curtailment sample size has reached the limit, no further sampling is required. Make a decision on the lot disposition, accept or not. This situation can happen (in theory) but with either good or poor quality the decision is made with the smallest average sample number compared to all other attributes sampling. See ISO 2859-5