Exponential smoothing forecas

Smoothing constant:

$0\mathrm{.}2$

$22($iii$)$ Enter appropriate formulae in the shaded cells to calculate an exponential smoothing forecast for week $9$ demand.

$23$ You should use the smoothing constant specified above and week one demand as the starting forecast for week two.

$24($iv$)$ Use the forecasts from weeks $4$ to $8$ to calculate the MAPE.

$25$

Absolute

percentage

error