Harlen Industries has a simple forecasting model: Take the actual demand for the same month last year and divide that by the number of fractional weeks in that month. This gives the average weekly demand for that month. This weekly average is used as the weekly forecast for the same month this year. This technique was used to forecast eight weeks for this year, which are shown below along with the actual demand that occurred. WEEK FORECAST DEMAND ACTUAL DEMAND 1 140 137 2 140 133 3 130 150 4 142 160 5 130 180 6 140 170 7 147 185 8 150 205 A. COMPUTE MAD B. USING RSFE COMPUTE TRACKING SIGNAL