Solution: https://www.chegg.com/homework-help/Operations-Management-7th-edition-chapter-3-problem-20P-solution-9781118013762

The question is: Learned experience by changing and observing the change of inputs to your question?

3-20. Use pattern tests to determine if the sample observations in Problem 3-5 reflect any nonrandom patterns. 3-5. The Great North Woods Clothing Company is a mail-order company that processes thousands of mail and telephone or- ders each week. They have a customer service number to handle customer order problems, inquiries, and complaints. The company wants to monitor the number of customer calls that can be classified as complaints. The total number of complaint calls the customer service department has received for each of the last 30 weekdays are shown as follows: Day N 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Complaint Calls 27 15 38 41 19 23 21 16 33 35 26 42 40 35 25 Day 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Complaint Calls 19 12 17 18 26 31 14 18 26 27 35 8 20 12 16 15 a. Construct a c-chart for this process with 30 control limits and indicate if the process was out of control at any time. b. What nonrandom (i.e., assignable) causes might result in the process being out of control