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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
21.            Two different forecasting techniques (F1 and F2) were used to forecast demand for cases of bottled water. Actual demand and the two sets of forecasts are as follows:
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|
 |
PREDICTED DEMAND |
 |
||
|
Period |
Demand |
F1 |
 |
F2 |
|
1 |
68 |
66 |
 |
66 |
|
2 |
75 |
68 |
 |
68 |
|
3 |
70 |
72 |
 |
70 |
|
4 |
74 |
71 |
 |
72 |
|
5 |
69 |
72 |
 |
74 |
|
6 |
72 |
70 |
 |
76 |
|
7 |
80 |
71 |
 |
78 |
|
8 |
78 |
74 |
 |
80 |
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a.   Compute MAD for each set of forecasts. Given your results, which forecast appears to be more accurate? Explain.
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b.  Compute the MSE for each set of forecasts. Given your results, which forecast appears to be more accurate?
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c.   In practice, either MAD or MSE would be employed to compute forecast errors. What factors might lead a manager to choose one rather than the other?
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d.  Compute MAPE for each data set. Which forecast appears to be more accurate?
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