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- Introduction to data envelopment analysisPublication . Santos, Jorge M. A.; Negas, Elsa Rosário; Cavique, LuísThis chapter introduces the basics of data envelopment analysis techniques, with a short historical introduction and examples of the constant returns to scale model (CRS) and the variable returns to scale (VRS) model. The ratio models are linearized and for both orientations primal and dual models are presented.
- Multiplier adjustment in data envelopment analysisPublication . Santos, Jorge M. A.; Cavique, Luís; Mendes, Armando B.Weights restriction is a well-known technique in the DEA field. When those techniques are applied,weights cluster around its new limits, making its evaluation dependent of its levels. This paper introduces a new approach to weights adjustment by Goal Programming techniques, avoiding the imposition of hard restrictions that can even lead to unfeasibility. This method results in models that are more flexible.