Average Run Length and the OC Curve of Sampling Plans

ABSTRACT

This paper amplifies the distinction between Type A and Type B sampling plans for individual lots and processes, respectively. It introduces the f-binomial distribution as a Poisson type finite analog to the hypergeometric distribution for use in constructing appropriate Type A OC curves for defects. The use of average run length in characterizing Type B sampling plans is also presented as a missing measure in the evaluation of such plans.

Keywords:

• Acceptance sampling
• f-binomial distribution
• Average run length
• OC curve
• Quality levels.

ACKNOWLEDGEMENTS

The author wishes to thank Dr. Joseph G. Voelkel for his helpful comments and suggestions.