EFFICIENCY ANALYSIS USING MULTI-PERIOD DEA MODELS

Data envelopment analysis (DEA) is a non-parametric method for efficiency and performance analysis of decision making units. The paper deals with production systems where decision making units are described by their inputs and outputs in several consecutive periods. The paper presents multi-period DEA models that allow evaluation the efficiency of DMUs within the whole production period. There are available several methodological approaches how to solve this class of problems. Sam Park and Park (2009) model is based on solving one optimization problem for all periods only. The paper deals with modification of this model and formulation of another one that is based on measuring inefficiency using slacks. The results of all formulated models are compared with a small numerical example.