The identification of the conditions (features) of a set of data. <a href="search.pl?p=Features">Features</a> can help select an <a href="search.pl?p=extrapolation">extrapolation</a> method, as described in Armstrong, Adya and Collopy (2001).<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>