The FORECAST Procedure

Introduction to Forecasting Methods

This section briefly introduces the forecasting methods used by the FORECAST procedure. For more detailed discussions of forecasting methods, see textbooks on forecasting and the section Forecasting Methods.

The FORECAST procedure combines three basic models to fit time series:

time trend models for long-term, deterministic change
autoregressive models for short-term fluctuations
seasonal models for regular seasonal fluctuations

Two approaches to time series modeling and forecasting are time trend models and time series methods.