For Linear (Holt) Exponential Smoothing, a level weight near zero implies that the smoothed trend is constant and that an ARIMA model with deterministic trend may be a more appropriate model. For ...

Crane, D. B., and James R. Crotty. "A Two-Stage Forecasting Model: Exponential Smoothing and Multiple Regression." Management Science 13, no. 8 (April 1966).

The FORECAST procedure includes the following features: choice of the following four forecasting methods: exponential smoothing: single, double, triple, or Holt two-parameter smoothing stepwise ...