Concept explainers
a
Interpretation:Number of minimum workforce to meet monthly demandis to be calculated.
Concept Introduction:
Linear program is a mathematical technique in which some variable maximized or minimized and some are kept constraint.
b
Interpretation:Total cost of constant workforce plan is to be calculated.
Concept Introduction:
Linear program is a mathematical technique in which some variable maximized or minimized and some are kept constraint.
c
Interpretation:Optimal plan is to be determined using the linear programming and the solution derived in part b is to be compared.
Concept Introduction:
Linear program is a mathematical technique in which some variable maximized or minimized and some are kept constraint.
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Production and Operations Analysis, Seventh Edition
- At the beginning of each week, a machine is in one of four conditions: 1 = excellent; 2 = good; 3 = average; 4 = bad. The weekly revenue earned by a machine in state 1, 2, 3, or 4 is 100, 90, 50, or 10, respectively. After observing the condition of the machine at the beginning of the week, the company has the option, for a cost of 200, of instantaneously replacing the machine with an excellent machine. The quality of the machine deteriorates over time, as shown in the file P10 41.xlsx. Four maintenance policies are under consideration: Policy 1: Never replace a machine. Policy 2: Immediately replace a bad machine. Policy 3: Immediately replace a bad or average machine. Policy 4: Immediately replace a bad, average, or good machine. Simulate each of these policies for 50 weeks (using at least 250 iterations each) to determine the policy that maximizes expected weekly profit. Assume that the machine at the beginning of week 1 is excellent.arrow_forwardScenario 3 Ben Gibson, the purchasing manager at Coastal Products, was reviewing purchasing expenditures for packaging materials with Jeff Joyner. Ben was particularly disturbed about the amount spent on corrugated boxes purchased from Southeastern Corrugated. Ben said, I dont like the salesman from that company. He comes around here acting like he owns the place. He loves to tell us about his fancy car, house, and vacations. It seems to me he must be making too much money off of us! Jeff responded that he heard Southeastern Corrugated was going to ask for a price increase to cover the rising costs of raw material paper stock. Jeff further stated that Southeastern would probably ask for more than what was justified simply from rising paper stock costs. After the meeting, Ben decided he had heard enough. After all, he prided himself on being a results-oriented manager. There was no way he was going to allow that salesman to keep taking advantage of Coastal Products. Ben called Jeff and told him it was time to rebid the corrugated contract before Southeastern came in with a price increase request. Who did Jeff know that might be interested in the business? Jeff replied he had several companies in mind to include in the bidding process. These companies would surely come in at a lower price, partly because they used lower-grade boxes that would probably work well enough in Coastal Products process. Jeff also explained that these suppliers were not serious contenders for the business. Their purpose was to create competition with the bids. Ben told Jeff to make sure that Southeastern was well aware that these new suppliers were bidding on the contract. He also said to make sure the suppliers knew that price was going to be the determining factor in this quote, because he considered corrugated boxes to be a standard industry item. Is Ben Gibson acting legally? Is he acting ethically? Why or why not?arrow_forwardScenario 3 Ben Gibson, the purchasing manager at Coastal Products, was reviewing purchasing expenditures for packaging materials with Jeff Joyner. Ben was particularly disturbed about the amount spent on corrugated boxes purchased from Southeastern Corrugated. Ben said, I dont like the salesman from that company. He comes around here acting like he owns the place. He loves to tell us about his fancy car, house, and vacations. It seems to me he must be making too much money off of us! Jeff responded that he heard Southeastern Corrugated was going to ask for a price increase to cover the rising costs of raw material paper stock. Jeff further stated that Southeastern would probably ask for more than what was justified simply from rising paper stock costs. After the meeting, Ben decided he had heard enough. After all, he prided himself on being a results-oriented manager. There was no way he was going to allow that salesman to keep taking advantage of Coastal Products. Ben called Jeff and told him it was time to rebid the corrugated contract before Southeastern came in with a price increase request. Who did Jeff know that might be interested in the business? Jeff replied he had several companies in mind to include in the bidding process. These companies would surely come in at a lower price, partly because they used lower-grade boxes that would probably work well enough in Coastal Products process. Jeff also explained that these suppliers were not serious contenders for the business. Their purpose was to create competition with the bids. Ben told Jeff to make sure that Southeastern was well aware that these new suppliers were bidding on the contract. He also said to make sure the suppliers knew that price was going to be the determining factor in this quote, because he considered corrugated boxes to be a standard industry item. As the Marketing Manager for Southeastern Corrugated, what would you do upon receiving the request for quotation from Coastal Products?arrow_forward
- Since economic and technological forecasts are beyond the expertise of an operations manager, he should not be concerned about them anymore. True Falsearrow_forwardThe Yeasty Brewing Company Produces a popular local beer known as Iron Stomach. Beer sales are somewhat seasonal, and Yeasty is planning its production and workforce levels on March 31 for the next six months. The demand forecasts are as follows: Month April May June July August September Production Days 14 20 24 26 20 18 Forecasted Demand (in hundreds of cases) 75 100 200 140 100 50 As of March 31, Yeasty had 70 workers on the payroll. Over a period of 20 working days when there are 100 workers on the pay roll, Yeasty produced 10,000 cases of beer. The cost to hire each worker is $200 and the cost of laying off each worker is $400. Holding costs amount to 1 dollar per case per month. As of March 31, Yeasty expects to have 3,000 cases of beer in stock. It plans to start October with 3,500 cases on hand. a) Formulate the problem of planning Yeasty's production levels as a linear program. b) Use Excel solver to solve the problem and give the solution (decision variables and objective…arrow_forwardLori Cook has developed the following forecasting model: where y demand for Kool Air conditioners and x= the outside temperature (degrees Fahrenheit) a) When the temperature outside is 70° F, demand forecast = b) When the temperature outside is 80° F, demand forecast = c) When the temperature outside is 90° F, demand forecast = 2 F2 W #3 2000 E $ 4 F4 R % 5 F5 T air conditioners (enter your response as an integer). air conditioners (enter your response as an integer). air conditioners (enter your response as an integer). MacBook Air 6 F6 Y & 7 y = 36.0 +4.30x, F7 U * 8 DII FB ( 9 DD F9 V This question ) 0 0 F10arrow_forward
- Answer the following: 1. Suppose that the demand in period 1 was 7 units and the demand in period 2 was 9 units. Assume that the forecast for period 1 was for 5 units. If the firm uses exponential smoothing with an alpha value of .20, what should be the forecast for period 3? 2. Weekly sales of copy paper at Cubicle Suppliers are provided in the table below. Compute a three-period moving average and a four-period moving average for weeks 5, 6, and 7. Compute the MAD for both forecasting methods. Which model is more accurate? Forecast week 8 with the more accurate method. Week Sales (cases) 1 17 2 21 3 26 4 18 5 29 6 17 7 21 3. The last four weekly values of sales were 80, 100, 105, and 90 units, respectively. The last four forecasts (for the…arrow_forwardSuppose a four period weighted average is being used to forecast demand. Weights for the periods are: Wt-4 = 0.1 Wt-3 = 0.2 Wt-2 = 0.3 Wt-1 0.4 Demand observed in the previous four periods was: At-4 = 325 At-3 = 361 At-2 = 478 At-1 = 400 What will be the demand forecast for period t? (Keep one decimal place in your answer).arrow_forwardPractice example. Please shoow solution.arrow_forward
- 12.4. The chairperson of the department of management at Tech wants to forecast the number of students who will enroll in operations management next semester in order to determine how many sections to schedule. The chair has accumulated the following enrollment data for the past eight semesters: Students Enrolled Semester in OM 1 270 2 310 250 4 290 370 6. 410 7 400 8. 450 a. Compute a three-semester moving average forecast for semesters 4 through 9. b. Compute the exponentially smoothed forecast (a = .20) for the enrollment data. c. Compare the two forecasts using MAD and indicate the most accurate. 3.arrow_forwardPLEASE HELP ME WITH THIS EXERCISE SO THAT I CAN LEARN HOW TO SLOVEarrow_forwardUsing the accompanying log-log graph, answer the following questions: What are the implications for management if it has forecast its cost on the optimum line? What could be causing the fluctuations above the optimum line? If management forecast the tenth unit on the optimum line, what was that forecast in hours? If management built the tenth unit as indicated by the actual line, how many hours did it take?arrow_forward
- Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,Purchasing and Supply Chain ManagementOperations ManagementISBN:9781285869681Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. PattersonPublisher:Cengage LearningContemporary MarketingMarketingISBN:9780357033777Author:Louis E. Boone, David L. KurtzPublisher:Cengage Learning