Response to the following:
1: Karl's Copiers sells and repairs photocopy machines, manager needs weekly forecasts of service callsso: can schedule service personnel. Use the ackclkleprite in the first period.for the forecast for the first woo so error measurement begifffin the second week. The Han. ager uses exponential smoothing with a = 0.20. Forecast the number of calls for week 6, which is next week.
|
Week
|
Actual Service Calls
|
|
1
|
-7-
24
|
|
2
|
32
|
|
3
|
36
|
|
4
|
23
|
|
5
|
25
|
2: Sales for the past 12 months at Dahvorth Company are given here.
|
Month
|
Wm ($ gala*
|
month
|
Saks (Annum)
|
|
Jaiury
|
20
|
-July
|
53.
|
|
Rainy
|
24
|
August
|
62
|
|
MCI
|
-27
|
-Septemter
|
54
|
|
NO
|
31
|
October
|
36
|
|
-mag
|
37
|
%mate(
|
32
|
|
:in
|
47
|
December
|
29
|
a. Use a three-month moving average to forecast the sales for the months May through December.
b. Use a four-month moving average to forecast the sales - for the months May through December.
c. Compare the performance of the two methods by -using the mean absolute deviation as the performance criterion. Which method would you recommend?
d. Compare the performance of the two methods by using the mean absolute percent error as the performance criterion. Which method would you recommend?
e. Compare the performance of the two methods by using the mean squared error as the performance cri¬terion. Which method would you recommend?