$.$ Read Section $8\mathrm{.}2(417-421)$

$2.$ Use Excel file, BB $8$A Data.xlsx$,$ attached.

$3.$ Plot actual demand versus forecast demand by plotting both, Actual and

Forecast in order of time index.

$4.$ Based on the chart identify periods of forecast with high error $($ in a text

box$).$

$5.$ Calculate three measures of forecast accuracy $($error$)$:

a$.$ MAE $-$ Mean Absolute Error $=$ MAD: Mean Absolute Deviation

b$.$ MAPE $-$ Mean Absoluter Percent Error

c$.$ MSE $$ Mean Squared Error. Read Section $8\mathrm{.}2(417-421)$

$2.$ Use Excel file, BB $8$A Data.xlsx$,$ attached.

$3.$ Plot actual demand versus forecast demand by plotting both, Actual and

Forecast in order of time index.

$4.$ Based on the chart identify periods of forecast with high error $($ in a text

box$).$

$5.$ Calculate three measures of forecast accuracy $($error$)$:

a$.$ MAE $-$ Mean Absolute Error $=$ MAD: Mean Absolute Deviation

b$.$ MAPE $-$ Mean Absoluter Percent Error

c$.$ MSE $$ Mean Squared Error