Artificial data constructed to represent a situation. Simulated data are used in <a href="search.pl?p=conjoint analysis">conjoint analysis</a> to represent such things as product designs. They can be used in <a href="search.pl?p=judgmental bootstrapping">judgmental bootstrapping</a> to see how changes would affect an expert’s forecasts. Simulated data have been used in <a href="search.pl?p=extrapolation">extrapolation</a> to see how various methods perform when the data come from a known process (for example, to examine effects of a <a href="search.pl?p=discontinuity">discontinuity</a> or high uncertainty).<o:p></o:p></P>