Form a project team of three or four students and construct a C&E diagram for paint nonconformities for a one-month period check for a riding lawn mower manufacturer that has the following problems: blister, 212; light spray, 582; drips, 227; overspray, 109; splatter, 141; bad paint, 126; runs, 434; and other, 50. Construct a Pareto diagram.

A major automotive manufacturer is using a sampling plan of n = 200 and c = 0 for all lot sizes. Construct the OC and AOQ curves. Graphically determine the AQL value for α= 0.05 and the AOQL value.

Construct the OC curve using the following 7 points.

Po
0.001
0.002
0.003
0.004
0.005
0.01
0.015

If the lot has 0.15 % defective, what is the probability of accepting the lot and the probability of rejecting the lot? In this contest explain the manufacturer’s risk and consumer’s risk. Comment on your findings.

For this sampling plan, determine the AOQ curve and the AOQL. Suppose that, over a period, 15 lots of 1000 automobiles are shipped by the manufacturer to the customer. The lots have 0.15% nonconforming and a sampling plan on n=200 and c=0 is used to determine acceptance. Calculate the AOQ. Write your comments.

Construct the ATI curve for this sampling plan. Examine the curve and write your comments.