. An electronics manufacturer buys mern-

ory devices in lots of 30,000 from a sup-

plier. The supplier has a long record of good quality performance, with an aver-

age fraction defective of approximately 0.10%. The quality engineering depart-

ment has suggested using a conventional acceptance-sampling plan with n = 32, c=0.

(a) Draw the OC curve of this sampling plan.

(b) Iflors are of a quality that is near the supplier's long-term process aver-

age, what is the average total inspec-

tion at that level of quality?

(c) Consider a chain-sampling plan with " = 32, c = 0, and i = 3.

Contrast the performance of this plan with the conventional sampling plan n= 32, c = 0.

(d) How would the performance of this chain-sampling plan change if we substituted i = 4 in part (c)?