The maximum number of members of a population who will eventually adopt an innovation. Some analysts attempt to measure this limit from <a href="search.pl?p=time-series data">time-series data</a>. Good <a href="search.pl?p=domain knowledge">domain knowledge</a> can help analysts to estimate the saturation level. The use of the saturation level is discussed in Meade and Islam (2001).<o:p></o:p></P>
<ul>
  <li>Meade, N. &amp; T. Islam (2001), “Forecasting the 
diffusion of innovations: Implications for time-series extrapolation,” in J. S. 
Armstrong (ed.), <I>Principles of Forecasting</I>. Norwell, MA: Kluwer Academic 
Press.</li>
</ul>