Operations Management
13th Edition
ISBN: 9781259667473
Author: William J Stevenson
Publisher: McGraw-Hill Education
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Chapter 11, Problem 2P
A manager would like to know the total cost of a chase strategy that matches the
Regular production= $35
Overtime = $70
Subcontracting = $80
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Plan production for a four-month period (February through May).
Given information:
For February and March, you should produce to exact demand forecast.
For April and May, you should use overtime and inventory with a stable workforce; stable means that the number of workersneeded for March will be held constant through May. However, government constraints put a maximum of 5,000 hours of overtime labor per month in April and May (zero overtime in February and March).
If demand exceeds supply, then backorders occur.
There are 100 workers on January 31.
You are given the following demand forecast: February, 80,000; March, 64,000; April, 100,000; May, 40,000.
Productivity is four units per worker hour, eight hours per day, 20 days per month.
Assume zero inventory on February 1.
Costs are hiring, $50 per new worker; layoff, $70 per worker laid off; inventory holding, $10 per unit-month; straight-time labor, $10 per hour; overtime, $15 per hour; backorder, $20 per unit.
Capacity planning requires a demand forecast for an extended period of time into the future. What concerns would you have regarding an extended forecast as a capacity planner?
Southeast Soda Pop, Inc., has a new fruit drink for which it has high hopes. John Mittenthal, the production planner, has assembled the following cost data and demand forecast:
demand forecast.
Quarter
Forecast
1
1,900
2
1,200
3
1,600
4
800
Costs/Other Data
Previous quarter's
output=1,200 cases
Beginning
inventory=0 cases
Stockout cost of
backorders=$160 per case
Inventory holding
cost=$40
per case at end of quarter
Hiring
employees=$35 per case
Terminating
employees=$80 per case
Subcontracting
cost=$65 per case
Unit cost on regular
time=$30 per case
Overtime
cost=$20 extra per case
Capacity on regular
time=1,900 cases per quarter
John's job is to develop an aggregate plan. The three initial options he wants to evaluate are:
•
Plan
A:
a strategy that hires and fires personnel as necessary to meet the forecast.
•
Plan
B:
a level strategy.
•
Plan
C:
a level strategy that…
Chapter 11 Solutions
Operations Management
Ch. 11 - What three levels of planning involve operations...Ch. 11 - What are the three phases of intermediate...Ch. 11 - Prob. 3DRQCh. 11 - Why is there a need for aggregate planning?Ch. 11 - What are the most common decision variables for...Ch. 11 - Prob. 6DRQCh. 11 - Briefly discuss the advantages and disadvantages...Ch. 11 - What are the primary advantages and limitations of...Ch. 11 - Briefly describe the planning techniques listed as...Ch. 11 - What are the inputs to master scheduling? What are...
Ch. 11 - Prob. 11DRQCh. 11 - What general trade-offs are involved in master...Ch. 11 - Who needs to interface with the master schedule...Ch. 11 - How has technology had an impact on master...Ch. 11 - Service operations often face more difficulty in...Ch. 11 - Name several behaviors related to aggregate...Ch. 11 - Compute the total cost for each aggregate plan...Ch. 11 - A manager would like to know the total cost of a...Ch. 11 - Determine the total cost for this plan given the...Ch. 11 - a. Given the following forecast and steady regular...Ch. 11 - Manager T. C. Downs of Plum Engines, a producer of...Ch. 11 - Manager Chris Channing of Fabric Mills, Inc., has...Ch. 11 - SummerFun. Inc., produces a variety of recreation...Ch. 11 - Nowjuice, Inc., produces Shakewell fruit juice. A...Ch. 11 - Wormwood, Ltd., produces a variety of furniture...Ch. 11 - Refer to Solved Problem 1. Prepare two additional...Ch. 11 - Refer to Solved Problem 1. Suppose another option...Ch. 11 - Prob. 12PCh. 11 - Prob. 13PCh. 11 - Prob. 14PCh. 11 - Prob. 15PCh. 11 - Refer to Example 3. Suppose that regular-time...Ch. 11 - Prob. 17PCh. 11 - Prob. 18PCh. 11 - Prepare a master production schedule for...Ch. 11 - Update the master schedule shown in Figure 11.11...Ch. 11 - Prepare a master schedule like that shown in...Ch. 11 - Determine the available-to-promise (ATP)...Ch. 11 - Prepare a schedule like that shown in Figure 11.12...Ch. 11 - The objective is to choose the plan that has the...Ch. 11 - Prob. 2CQ
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- Scenario 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_forwardc. Compute and tabulate the daily demand for each month in the table below (round off to the nearest whole number). MONTH PRODUCTION DAYS DEMAND FORECAST DEMAND PER DAY JAN 2022 16 150 ? FEB 2022 16 150 ? MAR 2022 23 250 ? APR 2022 21 250 ? MAY 2022 22 400 ? JUN 2022 22 500 ? JUL 2022 21 600 ? AUG 2022 20 750 ? SEP 2022 20 450 ? OCT 2022 20 250 ? NOV 2022 16 150 ? DEC 2022 16 150 ? TOTAL ? ? d. Assuming that MPQ Limited had adopted a level strategy for the year ended 31 December 2022, compute the average daily demand for the year (round off to the nearest whole number). e. Prepare a graph showing the monthly forecasts and average daily forecast (in units per day) for MPQ Limited.arrow_forward
- Given the following forecast and cost information, Regular time cost $ 40.00 per unitdetermine the total cost of a plan that uses regular time Overtime cost $ 60.00 per unitproduction output of 600 units per month, overtime is subcontracting cost $ 80.00 per unitused when needed up to a maximum of 60 units per holding cost $ 10.00 per unit per monthmonth, and subcontracting is used if additional units are needed to meet the forecast.Month Forecast1 5702 6003 6304 6505 6706 690Totalsarrow_forwardThis company has the following aggregate demand requirements and other data for the upcoming four quarters. Quarter Demand Previous quarter's output 1500 units 1 1400 Beginning inventory 200 units 2 1000 Stockout cost $50 per unit 3 1500 Inventory holding cost $8 per unit at end of quarter 4 1300 Hiring workers $5 per unit Laying off workers $10 per unit Unit cost $30 per unit Overtime $10 extra per unit Which of the following production plans is better: Plan 1—chase demand by hiring and layoffs; or Plan 2—produce at a constant rate of 1200 and obtain the remainder from overtime? Finish the calculation. Plan 1. Demand Regular Time Capacity Regular Time Production Hire Fire Initial Inventory Period 1 1,400 1200 Period 2 1,000 Period 3 1,500 Period 4 1,300…arrow_forwardAssume an initial starting Ft of 200 units, a trend (Tt ) of 8 units, an alpha of 0.30, and a delta of 0.40. If actual demand turned out to be 288, calculate the forecast including trend for the next period.arrow_forward
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- Determine the total cost for this plan given the following forecast:Month 1 2 3 4 5 6Forecast 380 400 420 440 460 480Use steady regular output of 400 units per month, use overtime as needed for up to 40 units permonth, and use subcontracting to make up any needed output to match the forecast. Unit costs are:Regular output = $25Overtime = $40Subcontract = $60Average Balance Inventory = $15arrow_forwardA manager has prepared a forecast of expected aggregate demand for the next six months. Develop an aggregate plan to meet this demand given this additional information: A level production rate of 500 units per month can be used. Backorders are allowed, and they are charged at the rate of $20 per unit per month. Inventory holding costs are $1 per unit per month in ending inventory. Determine the cost of this plan if regular time cost is $10 per unit and beginning inventory is zero. Overtime costs $16 per unit and subcontracting costs $20 per unit. In the 4th month, overtime is not possible. While outsourcing is not possible in the 3rd month. Overtime capacity is 50 units and subcontracting capacity is 50 units. Month Forecast 1 400 2 480 3 560 4 720 5…arrow_forwarda) GOT7 Soda Pop, Inc., has a new fruits drink. The production planner has assembled the following cost data and demand forecast as follow: [GOT7 Soda Pop, Inc., mempunyai minuman buah-buahan yang baru, Perancang pengeluaran telah mengumpul data tentang kos dan ramalan permintaan seperti berikut:] Quarter Demand 1,800 First Second 1,200 Third 1,600 Fourth 1,300 Table 1: Cost and demand forecast [Jadual 1: Kos dan ramalan permintaan] Previous quater's output 1,300 cases Beginning inventory 0 cases Stockout cost Inventory holding cost Hiring employees Terminating employees Subcontracting cost Unit cost on regular time Overtime cost RM150 RM40 per case at the end of quater RM40 per case RM80 per case RM60 per case RM30 per case RM15 extra per case You as the production planner need to develop an aggregate planning. You are required to: [Anda sebagai perancang pengeluaran perlu membangunkan perancangan agregat Anda dikehendaki untuk:] i) Assess plan A: strategy that hires and fires…arrow_forward
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