Question: After using your forecasting model for six months, you decide to test it using MAD and a tracking signal. Here are the forecast and actual

After using your forecasting model for six months, you decide to test it using MAD and a tracking signal. Here are the forecast and actual demands for the six- month period:

a. Find the tracking signal.
b. Decide whether your forecasting routine isacceptable.

PERIOD FORECAST ACTUAL May June July August September 450 500 550 600 650 700 500 550 400 500 675 600 October

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