Abstract
The range-adjusted measure (RAM) as one of the non-radial data envelopment analysis (DEA) models has been broadly used in the assessment of decision-making units (DMUs). In many situations, the DMUs have a multi-component (network) structure, where the output of each component can be used as the input of another component, which is referred to as intermediate output. Various methods with different forms of production possibility sets (PPSs) have been suggested to formulate the intermediate output in efficiency calculations that link network components and each of these methods leads to different efficiency scores. These different forms of PPSs include independent, relational, and cooperative, which can appraise the efficiency of a DMU from internal and external perspectives. This paper aims to clarify the relationship among different forms of PPSs for the network RAM-DEA model from internal and external perspectives by emphasizing the development of a network RAM-DEA model. This study shows that from internal evaluation, a DMU with a network structure may operate efficiently while it is inefficient from external evaluation. This study proves that to evaluate a DMU with a network structure, the cooperative form of PPS is more suitable from both internal and external perspectives. The independent form of PPS does not exactly define the relationships among the components, so it is not recommended for computing the efficiency of a network. Models associated with the relational form of PPS may cause excess supply (waste) in the network, which is not appropriate for internal evaluation. Finally, a real example illustrates the applicability of the presented model.
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Notes
The concept of weak disposability was first defined by Färe et al. (1989). This concept means that undesirable outputs can be reduced by the same reduction factor so that the relative proportions between the resulting outputs are kept constant. With this concept, the RAM-DEA model in this study can easily increase desirable outputs and simultaneously reduce undesirable outputs. The classification of technologies based on the hypothesis of weak disposability of outputs is reviewed in detail by Pham and Zelenyuk (2019).
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MT is an Assistant Professor at the Department of Industrial Management, Lorestan University, in Iran. MT has published over 25 refereed papers in peer-reviewed journals. His H-index in Google Scholar is 15. He has 10 years of industrial and consultation experience. He has published several refereed papers in many prestigious journals such as Operations Management Research, Sustainable production and consumption, Annals of Operations Research, Journal of Air Transport Management, international Journal of Electrical Power & Energy Systems. MG is an Associate Professor at the Department of Industrial Management, University of Esfahan, in Iran. In 2006, he obtained his PhD in Industrial Management from Sharif University, in Iran. He has published several papers in many prestigious journals such as Computers & Industrial Engineering, Sustainable Energy Technologies and Assessments, Journal of Industrial and Systems Engineering, International Journal of Mathematics in Operational Research. MT is a member of faculty in area of finance and accounting. He received his BS and MA in Accounting from Allameh Tabatabai University, Tehran, in Iran. He obtained his PhD in Accounting from Pune University, in India. He has published several refereed papers in many journals such as The Journal of Asian Finance, Economics and Business (JAFEB), International Journal of Economics and Financial Issues, Advances in Mathematical Finance and Applications, Australasian Accounting, Business and Finance Journal, International Journal of Finance & Managerial Accounting, Journal of Management Accounting and Auditing Knowledge, Journal of Accounting and Social Interests, International Journal of Nonlinear Analysis and Applications, Empirical Research in Accounting and Journal of Hunan University Natural Sciences.
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Tavassoli, M., Ghandehari, M. & Taherinia, M. Rang-adjusted measure: modelling and computational aspects from internal and external perspectives for network DEA. Oper Res Int J 23, 62 (2023). https://doi.org/10.1007/s12351-023-00802-9
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DOI: https://doi.org/10.1007/s12351-023-00802-9