14.8. Prepare a spreadsheet model for the commuter airline's weekly load factor data in T Table 14.4, and recalculate the forecasts using an of 0.2 and a of 0.2 . Have you improved on the original MAD? Table 14.4 follows the experience of a new commuter airline during its first eight weeks of business. The average weekly load factors (i.e., percentages of seats sold) show a steady increase, from approximately 30 percent for week 1 to approximately 70 percent for week 8 . In this example, the smoothed value St is calculated using equation (10), which is equation (5) modified by the addition of a trend value Tt1 to the previous smoothed value St1 to account for the weekly rate of increase in the load factor. Page 408 TABLE 14.4 Exponential Smoothing with Trend Adjustment: Commuter Airline Load Factor (= 0.5,=0.3)