Managing for Quality and Performance Excellence 9th Edition by James Evans,William Lindsay

Exercise 73

Note: Data for many of the problems in this chapter can be found in the Excel workbook C08Data.xlsx on the Student Companion Site. Click on the appropriate worksheet tab as noted in the problem (e.g., Prob. 8-6, etc.) to access the data.
Top Billers processes bills for customers. Lately, they have been getting complaints of errors in the bills they have processed. Bills can contain errors due to a number of causes, such as incorrect amounts, wrong dates, wrong customer information, etc. The quality manager for Top Billers decides to sample one customer's batch of bills, per day, to determine the number and proportion of errors. Use the u -chart to analyze the data found in the table in the worksheet Prob. 8-49 in the C08Data.xlsx file.