Use of arrows in ISO 2859-1 Table 1 and 2-A sampling plan

Hi Cove,

In ISO 2859-1 Table 1 and 2-A, if sample of 80 pcs is drawn and inspection at AQL 0.25, tin accept reject column there is an arrow pointing upwards i.e. use the first sampling plan above the arrow. Accept/reject shows 0/1. What would be the correct sample size to use, 50 or 80.

Thanks.

50 -- there is no 80 pc sample size for 0.25% AQL, it goes from 50 to 200 as the next step up.