Your manager is trying to determine what forecasting method to use. Based on the following historical data, calculate the following forecasts and specify what procedure you would utilize.   Month Actual Demand 1 64 2 67 3 69 4 65 5 71 6 73 7 76 8 77 9 77 10 82 11 83 12 85 Calculate the simple three-month moving average forecast for periods 4–12.(Round your answers to 3 decimal places.) Month Actual Demand 4 66.667 5 67.000 6 68.333 7 69.666 8 73.333 9 75.333 10 76.666 11 78.666 12 80.666   Calculate the weighted three-month moving average for periods 4–12 using weights of 0.30 (for the period t−1); 0.20 (for the period t−2), and 0.50 (for the period t−3). (Do not round intermediate calculations. Round your answers to 1 decimal place.)   Month Actual Demand 4 66.7 5 67.0 6 68.3 7 69.7 8 73.3 9 75.3 10 76.7 11 78.7 12 80.7

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter13: Regression And Forecasting Models
Section: Chapter Questions
Problem 42P: The file P13_42.xlsx contains monthly data on consumer revolving credit (in millions of dollars)...
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Your manager is trying to determine what forecasting method to use. Based on the following historical data, calculate the following forecasts and specify what procedure you would utilize.

 

Month

Actual Demand

1

64

2

67

3

69

4

65

5

71

6

73

7

76

8

77

9

77

10

82

11

83

12

85

  1. Calculate the simple three-month moving average forecast for periods 4–12.(Round your answers to 3 decimal places.)

Month

Actual Demand

4

66.667

5

67.000

6

68.333

7

69.666

8

73.333

9

75.333

10

76.666

11

78.666

12

80.666

 

  1. Calculate the weighted three-month moving average for periods 4–12 using weights of 0.30 (for the period t−1); 0.20 (for the period t−2), and 0.50 (for the period t−3). (Do not round intermediate calculations. Round your answers to 1 decimal place.)

 

Month

Actual Demand

4

66.7

5

67.0

6

68.3

7

69.7

8

73.3

9

75.3

10

76.7

11

78.7

12

80.7

 

e-1. Calculate the mean absolute deviation (MAD) for the forecasts made by each technique in periods 4–12. (Do not round
intermediate calculations. Round your answers to 3 decimal places.)
Mean Absolute
Deviation
Three-month moving average
Three-month weighted moving average
Single exponential smoothing forecast
Exponential smoothing with trend
e-2. Which forecasting method do you prefer?
Single exponential smoothing forecast
Exponential smoothing with trend forecast
Three-month weighted moving average
Three-month mnving ayerage
Transcribed Image Text:e-1. Calculate the mean absolute deviation (MAD) for the forecasts made by each technique in periods 4–12. (Do not round intermediate calculations. Round your answers to 3 decimal places.) Mean Absolute Deviation Three-month moving average Three-month weighted moving average Single exponential smoothing forecast Exponential smoothing with trend e-2. Which forecasting method do you prefer? Single exponential smoothing forecast Exponential smoothing with trend forecast Three-month weighted moving average Three-month mnving ayerage
c. Calculate the single exponential smoothing forecast for periods 2–12 using an initial forecast (F) of 63 and an a of 0.40. (Do not
round intermediate calculations. Round your answers to 3 decimal places.)
Single Exponential
Smoothing Forecast
Month
2
3
4
5
7
8
10
11
12
d. Calculate the exponential smoothing with trend component forecast for periods 2–12 using an initial trend forecast (T) of 1.60, an
initial exponential smoothing forecast (F) of 62, an a of 0.40, and a o of 0.30. (Do not round intermediate calculations. Round your
answers to 3 decimal places.)
Exponential Smoothing
with Trend
Month
2
4
6.
7
8
9
10
11
12.
9,
LO
Transcribed Image Text:c. Calculate the single exponential smoothing forecast for periods 2–12 using an initial forecast (F) of 63 and an a of 0.40. (Do not round intermediate calculations. Round your answers to 3 decimal places.) Single Exponential Smoothing Forecast Month 2 3 4 5 7 8 10 11 12 d. Calculate the exponential smoothing with trend component forecast for periods 2–12 using an initial trend forecast (T) of 1.60, an initial exponential smoothing forecast (F) of 62, an a of 0.40, and a o of 0.30. (Do not round intermediate calculations. Round your answers to 3 decimal places.) Exponential Smoothing with Trend Month 2 4 6. 7 8 9 10 11 12. 9, LO
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