An electronics manufacturer buys memory devices in lots of 30,000 from a supplier. The supplier has a long record of good quality performance, with an average fraction defective of approximately 0.10%. The quality engineering department has suggested using a conventional acceptance-sampling plan with .

a. Draw the OC curve of this sampling plan.

b. If lots are of a quality that is near the supplier’s long-term process average, what is the average total inspection at that level of quality?

c. Consider a chain sampling plan with . Contrast the performance of this plan with the conventional sampling plan .

d. How would the performance of this chain sampling plan change if we substituted  in part (c)?

Transcribed Image Text:

n = 32, c = 0