Managing Supply Chain and Operations 1st Edition by Thomas Foster ,Scott Sampson,Cynthia Wallin,Scott Webb

Exercise 41

A credit card processor has randomly sampled 100 credit card bills every week for 15 weeks. A credit card bill is considered defective if it has an error that requires that it be reprocessed. The number of credit card bills requiring reprocessing each week for the sampled credit card bills is as follows: The company wants to use the sampled information to develop a p chart to monitor the reprocessing operation. Construct a p chart using the sampled data and comment on whether the process appears to be in control or not.