Measuring the multi-component efficiency with shared inputs and outputs in data envelopment analysis

摘要

In many applications of data envelopment analysis (DEA), the existing models are designed to obtain a single efficiency measure. However, in many real situations, the units under consideration may perform several different functions or can be separated into different components. In these cases, some inputs are often shared among those components and all components are involved in producing some outputs. In this paper, bank branch efficiency is analyzed using data from 31 bank branches in Iran. First, a DEA-efficiency analysis of multi-component DMUs is introduced. Secondly, by grouping the branches according to their organizational designation, their efficiency is measured.