DEA

DEA is a contributed solver that deals with linear and mixed integer Data Envelopment Analysis (DEA) programs, as well as other linear, mixed integer and simple quadratic slice models.  It was developed by Michael Ferris and Meta Voelker at the University of Wisconsin.  When using DEA the model is repeatedly solved for different data sets (slices) that define model constraints.  The slice constraints are identified by a special alias (slice).  The DEA interface then generates the problem with all of the different data sets and manages the solution process in interaction with CPLEX so that the individual problems are not re-generated for each individual solve.  This reduces overall model generation time.  The data for the different slice solution are reported back through GDX files.  DEA interface can also be employed in select circumstances to facilitate scenario and sensitivity analyses.  The solver manual is on the web page http://www.gams.com/contrib/gamsdea/dea.htm.  A GAMS/BASE and a CPLEX license are needed to use DEA but DEA itself does not currently require a license.