Abstract
A few models in data envelopment analysis (DEA) have been proposed to evaluate performance of production systems which are composed of independent parallel production units. In this paper, we have developed a parallel DEA model for production systems which are composed of independent parallel subunits, so that each subunit uses its own inputs and a portion of the shared inputs to produce final outputs. Also, we will propose the models to calculate the efficiency of the whole system along with the efficiencies of its subunits. In addition to theoretical derivations, a case of 25 areas of Iran's Bank is used as an example to illustrate the whole idea.
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