HP 12C#ABA hp 12c_solutions handbook_English_E.pdf - Page 88
Forecasting with Exponential Smoothing
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present trend continues? What annual sales rate would the curve have predicted for the 5th year of the product's life? (Arrange the data as follows:) Group Group Group I II III 18 151 282 41 188 322 49 260 340 Keystrokes CLEAR 18 151 282 41 188 322 49 260 340 13 6 7 10 12 100 5 Display 0.00 18.00 151.00 1.00 41.00 188.00 2.00 49.00 260.00 3.00 0.004 0.65 373.92 349.09 363.36 373.92 202.60 Total number of entries. a b c Sales in 10th year, (in $K). Sales in 12th year, (in $K). Maximum annual sales (after very long product life). Sales in 5th year (actual sales were $188K). Forecasting with Exponential Smoothing A common method for analyzing trends in sales, inventory and securities is the moving average. Exponential smoothing is a version of the weighted moving average which is readily adaptable to programmable calculator forecasting. 87