forecast for Week $6?$

Week $1=10000$

Week $2=9000$

Week $3=8000$

Week $4=7000$

Week $5=6000$

Week $6=$ Predict using the $4-$period $)=(4$ moving average forecast

Last Period Forecast:

$F_{t+1}=D_t$

where $F_{t+1}=$ forecast for the next period, $t+1$ and $D=$ demand for the current period, $t$

Moving Average Weighted Moving Average

Forecast

Forecast

$F_{t+1}=\frac{{\displaystyle \underset{i=1}{\overset{n}{}}}{D}_{t+1-i}}{n}{F}_{t+1}={\displaystyle \underset{i=1}{\overset{n}{}}}{W}_{t+1-i}{D}_{t+1-i}$

where $F_{t-1}=$ forecast for the next period, $t+1$

and $D_{t-1-1}=$ actual demand for the period, $t-1-i$

where $F_{t-1}=$ forecast for the next period, $t+1$

and $D_{t-1-1}=$ actual demand for the period, $t+1-i$

and $n=$ number of most recent demand observations used in the forecast and $W_{t+1-i}=$ weight assigned to the demand in period, $t+1-i$