DTREG is a powerful statistical analysis program that generates classification and regression decision trees that model data and can be used to predict values. It is a robust application that is installed easily on any Windows system. It reads Comma Separated Value (CSV) data files that are easily created from almost any data source. Once you create your data file, just feed it into DTREG, and let it do all of the work of creating a decision tree and pruning it to the optimal size. Even complex analyses can be set up in minutes.