From: Stan Hilliard
Date: 02 Oct 2002
Time: 14:59:26
AQL is the percent defective on the x-axis under the producers point of the oc curve.
RQL is the percent defective on the x-axis under the consumers point of the oc curve.
With the software program TP105, you can generate the oc curve from n & Ac, or you can reverse that process by choosing two points on the oc curve. The program will calculate the n & Ac that make the oc curve that goes through those two points. This approach, using the "basics", does not use code letters.
In this two-point method for the design of sampling plans, AQL and Alpha have statistical meaning as defining a point on the oc curve, whereas mil-std-105E uses a different, non-statistical, meaning for AQL. For a complete explanation, see:
www.samplingplans.com/aqlprimer.htm