ABSTRACT
Like Poisson table PT-1, the probability of acceptance (Pa) Poisson table PT-2 is made up of cumulative Poisson terms. But, the Pa terms are arranged to make this cumulative table easier to use for finding operating characteristic (OC) curves, average outgoing quality (AOQ) curves, acceptance quality levels (AQLs), lot tolerance percent defectives (LTPDs), and other sample plan parameters. When the quality of the incoming lots is very good, almost all of the lots will be accepted, but the AOQ will be high, simply because there are almost no marginal incoming lots coming through and at least some of those lots are being rejected. When the incoming quality is very bad, the outgoing quality will be very good because almost all of the lots will be rejected, which means that the rejected lots will be 100% screened and all bad parts will be taken out before the lots are returned to the system.
