Assignment:
A large Portland manufacturer wants to forecast demand for a piece of pollution-control equipment. A review of past sales (At), as shown below, indicates that an increasing trend is present. Smoothing constants are assigned the values of alpha = 0.20 and beta = 0.4. The firm assumes the initial forecast for month 1 (F1) was 11.00 units and the trend over that period T1 was 2.00 units.
Using trend-adjusted exponential smoothing. Forecasts (Ft). Trend (ft). and Forecasts Including Trend (F/Tt) for months 1 through 6 have already been developed and are provided below. Continue with the process and determine Ft, Tt, and FITt for months 7 through 9 (round your responses to two decimal places):
