From: Stan Hilliard shilliard@samplingplans.com
Date: 06 May 2003
Time: 23:51:36
I favor the selection of sampling plans by choosing the producer's point and the consumer's point of the oc curve. The sample size and decision limits are calculated from that. It is called the two-point method.
With the two-point approach, you will understand exactly what your sampling plans are doing in terms of the producer AND the consumer. This is the chief advantage of the two-point approach over the ANSI/ASQC Z1.4 method.
You might check out the software for developing sampling plans by the two-point method at:
www.samplingplans.com/software.htm
Other medical device manufacturers use this approach. Importantly, the FDA does not object to their sampling plans.