Week $1=11000$

Week $2=10000$

Week $3=9000$

Week $4=8000$

Week $5=7000$

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 $D_t=$ demand for the current period, $t$

Moving Average

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

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

$7500$

$8500$

$8000$

$9000$

$6000$