Question

A large Portland manufacturer wants to forecast demand for a piece of​ pollution-control equipment. A review...

A large Portland manufacturer wants to forecast demand for a piece of​ pollution-control equipment. A review of past sales

​(Upper A Subscript tAt​),

as shown​ below, indicates that an increasing trend is present.  Smoothing constants are assigned the values of alphaα = 0.20 and betaβ = 0.4

The firm assumes the initial forecast for month 1 ​(Upper F 1F1​) was 11.00 units and the trend over that period Upper T 1T1 was 2.00 units.

Using​ trend-adjusted exponential​ smoothing, Forecasts (Upper F Subscript tFt​), Trend ​(Upper T Subscript tTt​), and Forecasts Including Trend ​(FIT Subscript tFITt​) for months 1 through 4 have already been developed and are provided below. Continue with the process and determine Upper F Subscript tFt​, Upper T Subscript tTt​, and FIT Subscript tFITt for months 5 and 6 ​(round your responses to two decimal​ places):

                                                                                                                                      

Month

​(t​)

Actual Demand

​(Upper A Subscript tAt​)

Forecast

​(Upper F Subscript tFt​)

Trend

​(Upper T Subscript tTt​)

Forecast Including Trend

​(FIT Subscript tFITt​)

1

12.012.0

11.0011.00

2.002.00

13.0013.00

2

17.017.0

12.8012.80

1.921.92

14.7214.72

3

24.024.0

15.1815.18

2.102.10

17.2817.28

4

19.019.0

18.6218.62

2.642.64

21.2621.26

5

22.022.0

?

?

?

6

23.023.0

?

?

?

7

31.031.0

?

?

?

8

26.026.0

?

?

?

9

35.035.0

?

?

?

10

?

?

?

?

Find ''?''

Homework Answers

Answer #1

Alpha 0.2
Beta 0.4
t At Ft Tt F/Tt
4 19 18.62 2.64 21.26
5 22 20.808 2.4592 23.2672
6 23 23.01376 2.357824 25.37158
7 31 24.89727 2.168097 27.06536
8 26 27.85229 2.482868 30.33516
9 35 29.46813 2.136055 31.60418
10 ? 32.28335 2.407721 34.69107
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