Updating a model using the actual value of a new <a href="search.pl?p=observation">observation</a>. Typically it refers to only an update in the <a href="search.pl?p=level">level</a>. You then obtain a sample of <I>h</I>-step-ahead forecasts based on originally estimated coefficients. Also called moving origin or rolling horizon. Armstrong (2001e) describes the use of successive updating.<o:p></o:p></P>
 <ul>
   <li>Armstrong, J. S. (2001e), “Combining forecasts,” in J. 
S. Armstrong (ed.), <I>Principles of Forecasting</I>. Norwell, MA: Kluwer 
Academic Press.</li>
 </ul>