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Demand forecasting: double exponential smoothing

Double exponential smoothing is applied to a time series exhibiting a linear trend pattern.

As an alternative you may apply the procedure of Holt .


Alpha smoothing constant
t smoothing constant
b(0,0) (estimated) initial value for the base level of the trend equation
b(1,0) (estimated) initial value for the slope of the trend equation
Y(t) observed demand in period t
MAD(t) mean absolute deviation in period t


  • regular demand with linear trend

- Hopp/Spearman (1996), Chapter 13

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