Question

In the table below there is data for demand of 19 periods. Using the forecasting method WMA , with n=3, w₁=0.6, w₂=0.3 and w₃=0.1, calculate the F_9.

Period	Dt
1	72.5
2	73.6
3	74.9
4	75.0
5	76.5
6	72.1
7	65.4
8	67.3
9	73.4
10	74.5
11	63.2
12	64.3
13	64.6
14	64.8
15	63.3
16	65.6
17	65.0
18	65.2
19	64.8
20

What is F₉?

(Write your answer using ONE decimal place)

Answer 1

from weghted moving forecasting with given weights and values of 67.3,65.4,72.1

F9 =67.3*0.6+65.4*0.3+72.1*0.1 = 67.2