In this problem, you are to test the validity of your forecasting model. Here are the forecasts for a model you have been using and the actual demands that occurred:

WEEK FORECAST ACTUAL 1

2 3

4 5

6 800 850 950 950 1,000 975 900 1,000 1,050 900 900 1,100 Use the method stated in the text to compute the MAD and tracking signal. Then decide whether the forecasting model you have been using is giving reasonable results.