A single sampling plan. as previously
defined, is specified by the pair of numbers (n,c). The sample
size is n, and the lot is rejected if there are more than
c
defectives in the sample; otherwise the lot is accepted.
There are two widely used ways of picking (n,c):
Use tables (such as MIL STD 105D) that focus on
either the AQL or the
LTPD
desired.
Specify 2 desired points on the OC
curve and solve for the (n,c) that uniquely determines an OC
curve going through these points.
The next two pages describe these methods in detail.