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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Moradi, M. doi  openurl
  Title Sensitivity and stability analysis in DEA with interval data Type
  Year (up) 2004 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 156 Issue 2 Pages 463-477  
  Keywords Data Envelopment Analysis (DEA ); Interval data; Sensitivity and radius stability analysis  
  Abstract In this paper, we find radius of stability for all decision making units, with interval data. In this approach, organization classification remains unchanged under perturbations of the interval data. Some numerical examples for illustration are given.  
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  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiMoradi2004 Serial 2660  
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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Shoja, N.; Sanei, M. doi  openurl
  Title An alternative approach for equitable allocation of shared costs by using DEA Type
  Year (up) 2004 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 153 Issue 1 Pages 267-274  
  Keywords Data Envelopment Analysis (DEA ); Equitable allocation  
  Abstract In many applications to which data envelopment analysis could be applied, there is often a fixed or common cost, which is imposed on all decision making units (DMUs), so that this cost can be assigned in an equitable way to the various DMUs. In a proposed approach by Cook and Kress [Eur. J. Oper. Res. 119 (1999) 652] of equitable allocation of shared costs between all DMUs, several problems should be solved, which gives rise to computational difficulties. In this paper, an approach is presented in which without solving linear programming problems only using simple formula, the equitable allocation is achieved.  
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  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiShojaSanei2004 Serial 2661  
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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Shoja, N.; Tohidi, G. doi  openurl
  Title A method for finding efficient DMUs in DEA Using linear programming Type
  Year (up) 2004 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 159 Issue 1 Pages 37-45  
  Keywords Data Envelopment Analysis (DEA ); Free disposal hull; Linear programming  
  Abstract In this paper, by using 0-1 linear programming a method is proposed to find efficient decision making units (DMUs). In proposed method, we put aside the production possibility set principles of the data envelopment analysis (DEA) models and only consider the observations set. The presented method compares each DMU with observed DMUs and identifies the efficient DMUs. This method consists of a one-stage algorithm. In each iteration of this algorithm, by solving a 0-1 linear programming problem, at least one efficient DMU is identified.  
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  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiShojaTohidi2004 Serial 2662  
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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Shoja, N.; Tohidi, G.; Razavyan, S. doi  openurl
  Title Input estimation and identification of extra inputs in inverse DEA models Type
  Year (up) 2004 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 156 Issue 2 Pages 427-437  
  Keywords Data Envelopment Analysis (DEA ); Inverse DEA model; Multi-objective programming  
  Abstract In this paper we show that the inverse data envelopment analysis (DEA) models can be used to estimate inputs for a decision making unit (DMU) when some or all outputs and efficiency level of this DMU are increased or preserved. An approach is also introduced to identify extra inputs (maximum reduction amounts in inputs) when the outputs are estimated using the proposed models by Yan et al. [European Journal of Operational Research 136 (2002) 19] and Jahanshahloo et al. [Applied Mathematics and Computation 19 (2003)]. Numeric results are presented for an example taken from the literature.  
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  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiShojaTohidiRazavyan2004 Serial 2663  
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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Shoja, N.; Tohidi, G.; Razavyan, S. doi  openurl
  Title Ranking using I1-norm in data envelopment analysis Type
  Year (up) 2004 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 153 Issue 1 Pages 215-224  
  Keywords Data Envelopment Analysis (DEA ); Ranking; Efficiency  
  Abstract In this paper, we present a method for previous termrankingnext term extreme efficient decision making units in previous termdata envelopment analysisnext term models with constant and variable returns to scale. In this method, we exploit the leave-one-out idea and l1-previous termnorm.next term The proposed method in this paper is able to remove the existing difficulties in some methods.  
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  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiShojaTohidiRazavyan2004a Serial 2664  
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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Shoja, N.; Tohidi, G.; Razavyan, S. doi  openurl
  Title The outputs estimation of a DMU according to improvement of its efficiency Type
  Year (up) 2004 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 147 Issue 2 Pages 409-413  
  Keywords Data Envelopment Analysis (DEA ); Inverse DEA model; Multi-objective programming  
  Abstract This paper develops the presented method by Yan et al. [Eur. J. Operat. Res. 136 (2002) 19]. In this paper, by using inverse data envelopment analysis model, a method to estimate output levels of a decision making unit is presented when some or all of its input entities are increased and its current efficiency level is improved.  
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  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiShojaTohidiRazavyan2004b Serial 2665  
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Author Jahanshahloo, G.R.; Sanei, M.; Hosseinzadeh Lotfi, F.; Shoja, N. doi  openurl
  Title Using the gradient line for ranking DMUs in DEA Type
  Year (up) 2004 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 151 Issue 1 Pages 209-219  
  Keywords Data Envelopment Analysis (DEA ); Gradient line; Ranking  
  Abstract In this paper a method, based on using gradient line, for ranking DMUs is proposed. The advantage of this method is its stability and robustness, where data have special structure. Some numerical examples are presented to show the results.  
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  Call Number Admin @ admin @ JahanshahlooSaneiHosseinzadeh-LotfiShoja2004 Serial 2672  
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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Moradi, M. doi  openurl
  Title A DEA approach for fair allocation of common revenue Type
  Year (up) 2005 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 160 Issue 3 Pages 719-724  
  Keywords Data Envelopment Analysis (DEA ); Fair allocation of common revenue  
  Abstract An issue of considerable importance, how to allocate a common revenue in an equitable manner across a set of competing entities. This paper introduces a new approach to obtaining allocation common revenue on all decision making units (DMUs) in such a way that the relative efficiency is not changed. In this method for determining allocation common revenue dose not need to solving any linear programming. A numerical example is provided to illustrate the results of the analysis.  
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  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiMoradi2005 Serial 2998  
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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Rezai, H.Z.; Balf, F.R. doi  openurl
  Title Using Monte Carlo method for ranking efficient DMUs Type
  Year (up) 2005 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 162 Issue 1 Pages 371-379  
  Keywords Data Envelopment Analysis (DEA ); Ranking; Efficiency; Monte Carlo method  
  Abstract For ranking efficient DMUs some methods have been developed. These methods are not able to rank non-extreme efficient DMUs. In this paper, using Monte Carlo method, a method has been developed which is able to rank all (extreme and non-extreme) efficient DMUs.  
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  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiRezaiBalf2005 Serial 2999  
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Author Jahanshahloo, G.R.; Hosseinzadeh Lotfi, F.; Shoja, N.; Tohidi, G.; Razavyan, S. doi  openurl
  Title A one-model approach to classification and sensitivity analysis in DEA Type
  Year (up) 2005 Publication Applied Mathematics and Computation Abbreviated Journal  
  Volume 169 Issue 2 Pages 887-896  
  Keywords Data Envelopment Analysis (DEA ); Sensitivity analysis; Efficiency; Stability radius  
  Abstract In this paper we use a simple but very important modification of proposed model by Cooper et al. [Journal of Productivity Analysis 15 (2001) 217-246] for classification and determining stability radius and variations ranges of efficient and inefficient decision making units (DMUs). In the suggested method, the number of problems which are solved, is less than of previous methods. We apply the presented approach for real world data set.  
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  Notes Approved  
  Call Number Admin @ admin @ JahanshahlooHosseinzadeh-LotfiShojaTohidiRazavyan2005 Serial 3000  
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