For Simple or Double (Brown) Exponential Smoothing, a level weight near zero implies that simple differencing of the time series may be appropriate. For Linear (Holt) Exponential Smoothing, a level ...
Crane, D. B., and James R. Crotty. "A Two-Stage Forecasting Model: Exponential Smoothing and Multiple Regression." Management Science 13, no. 8 (April 1966).
names the SAS data set containing the input time series for the procedure to forecast ... to use in calculating starting values for the trend parameters in the exponential smoothing, Winters, and ...