OSDEA Library Features

This pages describes the DEA models which OSDEA can solve as well as which information is available in the solution. OSDEA can be run on both 32 and 64 bits systems.

DEA Models which OSDEA Can Solve
The library solves nearly 40 different types of DEA problems and provides detailed solutions for each of those. The models which OSDEA can solve are as follows:
 * CCR (Charnes Cooper and Rhodes model). Model available in Input and Output oriented versions.
 * BCC (Banker, Charnes & Cooper model). Model available in Input and Output oriented versions.
 * SBM (Slack Based Model - Model developped by Kaoru Tone). Model available in Input & Output oriented as well as Variable, Increasing, Decreasing and Generalised Return To Scale versions.
 * IRS (Increasing Return to Scale - technical efficiency). Available in Input and Output oriented versions.
 * DRS (Decreasing Return to Scale - technical efficiency). Available in Input and Output oriented versions.
 * GRS (Generalised Return to Scale - technical efficiency). Available in Input and Output oriented versions.
 * NC (Non Controllable Model - enabling some variables to be set as non-controllable; i.e. variables on which no slack is allowed). Available in IRS, DRS, GRS and input / output oriented versions.
 * ND (Non Discretionary Model - enabling some variables to be set as non-discretionary; i.e. variables on which slack are allowed but do not impact the score). Available in IRS, DRS, GRS and input / output oriented versions.

Each model in the library has a description. It is possible to get the description by using the getDescription method as per illustrated below.

This will give a description like the one below (in this case the DRS_O model):

What the Solution Includes
Solutions include:
 * DMU score
 * Projections
 * Reference Set (or peer group)
 * Slacks
 * Weights
 * Variables corresponding to the convexity constraints when available.
 * Efficiency status