Etude des séries chronologiques par les méthodes de lissage

This note briefly describes forecasting procedures for time series based on smoothing techniques. The following procedures are examined : exponential smoothing for
non-seasonal time series showing no trend, Holt procedure for non-seasonal time series with trend and Holt-Winters procedure for time series containing trend and seasonal variation.
The methods are illustrated by an example processed with Minitab software.