pter 1: Operations Strategy Brownstown Post Office is evaluating the productivity of its mail processing centers. The centers differ in the degree of automation, the type of work that can be performed, and the skill of the workers. a. Calculate the multifactor productivity for each center. b. Workers in Center 1 are scheduled to receive a 10% pay raise next month will the calculated productivity increase or decrease (assuming employee effort remains the same)? c. A new processing machine is available for Center 2 that would increase the output to 5000 pieces per hour at an additional overhead rate of $30 an hour. Should Browntown install the new processing a. The Colonial House Furniture Company manufactures two drawer oak file cabinets that are sold unassembled through catalogues. The company initiates production of 150 cabinet packages each week. The percentage of good-quality cabinets averages 83% per week, and the percentage of poorquality cabinets that can be reworked is 60%. Determine the weekly product yield of file cabinets. b. From 2a, the company is investing in quality initiatives. If the company desires a product yield of 145 units per week, what must the new initial percentage of good-quality cabinets be? c. The Luna Shoe Company manufactures a number of different styles of athletic shoes. Its biggest seller is the PierZ running shoe. At the end of 2015, Luna implemented a quality-management program. The company's shoe production for the past two years and manufacturing costs are as follows. Only 25% of the defective shoes can be reworked, at a cost of $2 apiece. Compute the manufacturing cost per good product for each year. Chapter 5: Queuing Theory a. McBurger's fast-food restaurant has a drive-through window with a single server who takes orders from an intercom and also is the cashier. Other employees who prepare the orders assist the window operator. Customers arrive at the ordering station prior to the drive-through window every 3.6 minutes (exponentially distributed) and service time is 2.4 minutes (exponentially distributed). Determine the average length of the waiting line \& waiting time. b. The Minute Stop Market has 1 pump for gasoline, which can service 10 customers per hour (Poisson distributed). Cars arrive at the pump at a rate of 5 per hour (Poisson distributed). Determine the average queue length, the average time a car is in the system, and the average time a car must wait. Exam 1 info and review problems 2 c. From 3b, if during the period from 4:00 P.M. to 5:00 P.M., the arrival rate increases to 12 cars per hour, what will be the effect on the average queue length? d. Huang's television-repair service receives an average of 4TVs per day to be repaired. If the service manager wants to be able to tell customers that they can expect their TV back in 3 days (thus time in system, W=3 days), what must the service rate be in order to accomplish this goal? e. From 5d, they cannot accommodate more than 10TVs at a time (under repair \& waiting for service). What is the probability that the number of TVs on hand will exceed the shop capacity of 10 TVs? Chapter 12: Forecasting a. What is the 3-month moving average forecast for April? b. What is the weighted moving average for April if Wt=75% and Wt1=25% ? c. What is the exponential smoothing forecast for April if =0.40 and FMarch=150 ? d. If the forecast for Jan, Feb, \& Mar are 125, 140, and 180, respectively, what is MAD \& MAPD for January-March? hapter 6: Process Analysis a. Patricia Zell, a dollmaker from Olney, Maryland, is interested in the mass marketing and production of a ceramic doll of her own design called Tiny Trisha. The initial investment required for equipment is estimated at $25,000. Labor and material costs are approximately $10 per doll. If the dolls can be sold for $50 each, what volume of demand is necessary for the Tiny Trisha doll to break even? b. Soft Key is trying to determine how best to produce its newest product, DVORK keyboards. The keyboards could be produced in-house using either Process A or Process B, or purchased from a supplier with costs shown below. For what levels of demand is each option the best? Chapter 16: Lean Systems a. CoryTech Inc's demand for circuit boards is 250 per 40 -hour work week. The longest step in the process takes 11.2 minutes to complete. What is the takt time? b. From 16a, can they meet the demand with the process as-is