A type of expert system that is applied to time-series <a href="search.pl?p=extrapolation">extrapolation</a>. Rules based on forecasting expertise and <a href="search.pl?p=domain knowledge">domain knowledge</a> are used to combine alternative extrapolations. Armstrong, Adya and Collopy (2001) describe principles for rule-based forecasting. <o:p></o:p></P>
 <ul>
   <li>Armstrong, J. S., M. Adya &amp; F. Collopy (2001), 
“Rule-based forecasting: Using judgment in time-series<SPAN 
style="mso-spacerun: yes">&nbsp; </SPAN>extrapolation,” in J. S. Armstrong 
(ed.), <I>Principles of Forecasting.</I> Norwell, MA: Kluwer Academic 
Press.</li>
 </ul>