different dmus’ configuration in dea

Data envelopment analysis (dea) provides performance evaluation for a set of homogeneous decision making units (dmus) in the sense that all dmus evaluated with the same criteria setting. in some settings, however, the assumption of having a common input and output bundle may not hold. this motivates to the issue of how to fairly evaluate efficiency when inputs and outputs configurations are different. in the current paper we proposed a three-process methodology on the base of combined-oriented ccr model for performance evaluation a set of dmus when the requirement of homogeneity among inputs and outputs is relaxed. specifically, the overall efficiency of a dmu is viewed as a combination of a set of product lines efficiencies.