Models for efficiency evaluation of decision making units

The paper deals with models and methods for evaluation of efficiency and performance of production units. Especially, it aims at data envelopment analysis (DEA) models, which are based on the definition of efficiency as the ratio of outputs produced by the unit on the one hand and inputs spent in the production process on the other hand. Standard data envelopment analysis models divide the units into inefficient and efficient ones but they make it not possible to classify the efficient units. That is why the paper deals with several definitions of super efficiency that are bases for classification of efficient units. The models are illustrated on a numerical example. The proposed approaches are applied in assessing the efficiency of branches of a Czech bank. Computer solution of DEA models and future research is discussed in conclusions.