00356 –268bb4fa217b68c5b6c8bf725af104

360

Prairie & Zimmer

Sample RatÄ™

FigurÄ™ 7. Contours of Constant Number of Accepted Defective Units for Q* = .5.

with c = 20, Pi = .20, P2 = .10 and concordance criterion n = 100x - 33. If no failures are found during production, use of EÄ…uation [10] shows that 228 units will be tested. If there is an increase in the failure ratÄ™ by . 10, FigurÄ™ 4 can be used to determine the average number of defective units accepted before the problem is detected. During Level 1 sampling, the average number of defective units accepted is about 5 and during Level 2 sampling it is about 10. Figures 8, 9, and 10 show operating characteristics for the plan. FigurÄ™ 8 shows the fraction inspected, FigurÄ™ 9 the outgoing fraction defective and FigurÄ™ 10 the percent produced under different levels of sampling, all as a function of the fraction defective. These figures were obtained by Computer simulation.