OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
7th Edition
ISBN: 9780077835439
Author: Roger G Schroeder, M. Johnny Rungtusanatham, Susan Meyer Goldstein
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 10, Problem 2P
The number of daily calls for the repair of Speedy copy machines has been recorded as follows:
| October | Calls |
| 1 | 92 |
| 2 | 127 |
| 3 | 106 |
| 4 | 165 |
| 5 | 125 |
| 6 | 111 |
| 7 | 178 |
| 8 | 97 |
- a. Prepare three period moving-average
forecasts for the data. What is the error on each day? - b. Prepare three-period weighted-moving-average forecasts using weights of ω1 = .5, ω2 = .3, ω3 = .2.
- c. Which of the two forecasts is better?
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The number of daily calls for the repair of Speedy copy machines has been recorded as follows: a. Prepare three-period moving-average forecasts for the data. What is the error on each day? b. Prepare three-period weighted-moving-average fore-casts using weights of w1= .5, w2= .3, w3= .2. c. Which of the two forecasts is better?
In the Atlanta area, the number of daily calls for the repair of Speedy copy machines has been recorded as follows:
October
Calls
1
92
2
127
3
106
4
165
5
125
6
111
7
178
8
97
Prepare a three-period moving-average forecast for periods 4-8. What is the error on each day?
Prepare a three-period weighted moving average forecast for periods 4-8 using weights of w1=.5, w2=.3, w3=.2
Which of the two forecasts is better? (Use CFE to calculate the better method)
Week Sales1 27502 31003 32504 28005 29006 30507 33008 31009 295010 300011 320012 3150Develop a three-week moving average.
A.What is the forecast for week 5? (Make sure no decimal place and no comma. EX: 1234)
B.What is the value of MSE (mean squared error) with regard to a three-week moving average? (Make sure no decimal place and no comma. EX: 1234)
C.Develop the exponential smoothing with the alpha value of 0.20. What is the forecast for week 5? (Make sure no decimal place and no comma. EX: 1234)
D.What is the value of MSE (mean squared error) with regard to the exponential smoothing? (Make sure no decimal place and no comma. EX: 1234)
E.Which method is more accurate? (1 for Moving average, 2 for Exponential Smoothing)
Chapter 10 Solutions
OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
Ch. 10.S - Ace Hardware sells spare parts for lawn mowers....Ch. 10.S - eXcel The daily demand for chocolate donuts from...Ch. 10.S - The SureGrip Tire Company produces tires of...Ch. 10.S - eXcelManagement believes there is a seasonal...Ch. 10.S - Management of the ABC Floral Shop believes that...Ch. 10 - Prob. 1DQCh. 10 - What is the distinction between forecasting and...Ch. 10 - Qualitative forecasting methods should be used...Ch. 10 - Describe the uses of qualitative, time-series, and...Ch. 10 - Qualitative forecasts and causal forecasts are not...
Ch. 10 - Prob. 6DQCh. 10 - What are the advantages of exponential smoothing...Ch. 10 - How should the choice of be made for exponential...Ch. 10 - Prob. 9DQCh. 10 - Prob. 10DQCh. 10 - Explain how CPFR can be used to reduce forecasting...Ch. 10 - Under what circumstances might CPFR be useful, and...Ch. 10 - Daily demand for marigold flowers at a large...Ch. 10 - The number of daily calls for the repair of Speedy...Ch. 10 - 3-The ABC Floral Shop sold the following number of...Ch. 10 - The Handy Dandy Department Store had forecast...Ch. 10 - 5-The Yummy Ice Cream Company uses the exponential...Ch. 10 - Using the data in problem 2, prepare exponentially...Ch. 10 - Compute the errors of bias and absolute deviation...Ch. 10 - eXcel At the ABC Floral Shop, an argument...Ch. 10 - Only a portion of the following table for...Ch. 10 - A candy store has sold the following number of...Ch. 10 - eXcel A grocery store sells the following number...Ch. 10 - Prob. 12PCh. 10 - The Easyfit tire store had demand for tires shown...Ch. 10 - Prob. 14P
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