Questions from General Operations Management

Q: Peter Ittig’s department store, Ittig Brothers, is Amherst’s largest independent

Peter Ittig’s department store, Ittig Brothers, is Amherst’s largest independent clothier. The store receives an average of six returns per day. Using z = 3, would 9 returns in a day warrant action?

Q: An ad agency tracks the complaints, by week received, about

An ad agency tracks the complaints, by week received, about the billboards in its city: a) What type of control chart would you use to monitor this process? Why? b) What are the 3-sigma control limits...

Q: Frito-Lay, the multi-billion-dollar subsidiary of

Frito-Lay, the multi-billion-dollar subsidiary of food and beverage giant PepsiCo, maintains 36 plants in the U.S. and Canada. These facilities produce dozens of snacks, including the well-known Lay’s...

Q: The school board is trying to evaluate a new math program introduced

The school board is trying to evaluate a new math program introduced to second-graders in five elementary schools across the county this year. A sample of the student scores on standardized math tests...

Q: Telephone inquiries of 100 IRS “customers” are monitored daily at

Telephone inquiries of 100 IRS “customers” are monitored daily at random by Xiangling Hu. Incidents of incorrect information or other nonconformities (such as impol...

Q: The accounts receivable department at Rick Wing Manufacturing has been having difficulty

The accounts receivable department at Rick Wing Manufacturing has been having difficulty getting customers to pay the full amount of their bills. Many customers complain that the bills are not correct...

Q: The overall average of a process you are attempting to monitor at

The overall average of a process you are attempting to monitor at Gihan Edirisinghe Motors is 75 units. The process standard deviation is 1.95, and the sample size is n = 10. What would be the upper a...

Q: The overall average of a process you are attempting to monitor at

The overall average of a process you are attempting to monitor at Feryal Erhun Enterprises is 50 units. The average range is 4 units. The sample size you are using is n = 5. a) What are the upper and...

Q: Thirty-five samples of size 7 each were taken from a

Thirty-five samples of size 7 each were taken from a fertilizer-bag-filling machine at Panos Kouvelis Lifelong Lawn Ltd. The results were overall mean = 57.75 lb; average range = 1.78 lb. a) Determine...

Q: Auto pitch devices are made for both major- and minor-

Auto pitch devices are made for both major- and minor-league teams to help them improve their batting averages. When set at the standard position, Auto pitch can throw hardballs toward a batter at an...