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data-envelopment
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Evaluation of Dea Models for the Out puts,Inputs Estimation and Improvement Organizational Performance
, M.Sc. Thesis Sharif University of Technology ; Kianfar, Farhad (Supervisor)
Abstract
Measurement of efficiency is a significant issue in organizations which is used to improvement efficiency and performance .one of the serious offaires in any country, is banking, inefficiency in which leads to problems and obstacles in developing capital market. In this research, Data Envelopment Analysis models are used to estimate the extent of performance in decision making units (DMU’s) to improve inefficient ones. We change the inputs ( outputs) to a special unit at both the constancy or improvement of efficiency using the DEA models, we estimate the values of output ( input ) levels. Howeve, we assume the data of (the values of input ( output ) levels ) can be either crisp or interval....
A Review on DEA and Development of an Algorithm on Sensitivity Analysis and Stability Region
, M.Sc. Thesis Sharif University of Technology ; Modarres Yazdi, Mohammad (Supervisor)
Abstract
Data envelopment Analysis is a non parametric technique which estimates the efficiency of a decision making unit in compare with others. In correspondent literature this unit’s Inputs and outputs are often assumed to be deterministic, but in recent years different approaches which viewing the data as non deterministic are presented. In this study we propose an algorithm for determining the stability region of a DMU while we assume other DMUs’ data are fixed. This algorithm is based on changing the reference set of the under investigation DMU. In fact applying these changes make the DMU move toward other DMUs’ efficient frontiers and by using this fact it is possible to determine the...
Goal Directed Programming for Determining Process Efficiency Using Data Envelopment Analysis
, Article Journal of Mathematical Modelling and Algorithms in Operations Research ; 2013 , Pages 1-17 ; 22142487 (ISSN) ; Adldoost, H ; Saen, R. F ; Sharif University of Technology
Springer Netherlands
2013
Abstract
There are numerous measurement methods for process performance control. One of which, widely used in quality control programs, is process capability (Cp) index. The advantage of this index is due to the high amount of information extracted from it. Since Cpis independent from a particular measurement unit it can be used to compare several quite different processes. While the relative efficiency of the process performance based on the Cpfor a period is satisfying, the process may lose efficiency in the next period for variety of reasons and could not keep up with the standard limits. The objective of this paper is to develop a new approach for measuring the relative efficiency of peer...
Promotion of low-carbon economy through efficiency analysis: A case study of a petrochemical plant
, Article International Journal of Environmental Research ; 2020 ; Abbaspour, M ; Abedi, Z ; Ahmadian, M ; Sharif University of Technology
Springer Science and Business Media Deutschland GmbH
2020
Abstract
Over the past few decades, industrial development has caused a dramatic increment in greenhouse gas (GHG) emissions, as a leading cause of climate change. Modifying the industrial plants' environmental performance is the main pillar of improving efficiency that can reduce the waste of resources and make achieving lower-cost global emission reduction targets of the Kyoto protocol's clean development mechanism (CDM) possible. Considering the essentiality of knowledge-based research in increasing the awareness of policymakers by providing better access to accurate and reliable information, an analytical survey on efficiency in oil, gas, and petrochemical industries has been conducted by...
A DEA approach for comparing solution efficiency in U-line balancing problem using goal programming
, Article International Journal of Advanced Manufacturing Technology ; Volume 61, Issue 9-12 , August , 2012 , Pages 1161-1172 ; 02683768 (ISSN) ; Hassanzadeh, R ; Mahdavi, I ; Mahdavi Amiri, N ; Sharif University of Technology
Springer
2012
Abstract
Line balancing problem plays an important role in the decision making process to increase efficiency and productivity. Recently, U-shaped layout in many production lines has replaced the traditional straight line layout using just-in-time concept. Here, we propose a model, using multi-objective decision making approach to the U-shaped line balancing problem, to offer enhanced decision maker flexibility, by allowing for conflicting goals. The assembly line operation efficiency is the most significant aim in our study, and this efficiency relates to management of resources and the solution of line balancing problem. First, the U-shaped line balancing problem is solved considering the model's...
A comparative appraisal of roadway accident for Asia-Pacific countries
, Article International Journal of Engineering, Transactions A: Basics ; Volume 23, Issue 2 , 2010 , Pages 111-126 ; 17281431 (ISSN) ; Sharif University of Technology
Materials and Energy Research Center
2010
Abstract
This paper describes an attempt to shed some light on road safety in Asia Pacific region by characterizing and assessing its road accidents. The relevant national road accident data were extracted from centralized data sources of international agencies. Due to data incompleteness and missing values, 21 Asia Pacific countries, presenting more than half of the world's population, were selected for detailed analysis. The study database consisted of 7 variables, covering years 1980 and 1995. The univariate and multivariate statistical analyses for the selected countries showed interesting results and relations for the selected variables. Accident rates, reflecting road accident risk and...
A new integrated AR-IDEA model to find the best DMU in the presence of both weight restrictions and imprecise data
, Article Computers and Industrial Engineering ; Volume 125 , 2018 , Pages 357-363 ; 03608352 (ISSN) ; Khalili, M ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
Data envelopment analysis (DEA) is a mathematical programming approach to efficiency measurement in many applications. In some real-life applications, three situations are established. First, the input and output data are imprecise. Second, it is necessary to use the weight restrictions in order to consider the management view. Third, the decision maker needs to find the best decision making units (DMUs). In the traditional DEA model, it is supposed that the input and output data are precise and the weights are free. This paper proposes a new mixed integer assurance-region imprecise DEA (AR-IDEA) model to find the best DMU by solving only one model. Also, a new algorithm is developed to find...
Efficiency measurement in data envelopment analysis in the presence of ordinal and interval data
, Article Neural Computing and Applications ; 2016 , Pages 1-12 ; 09410643 (ISSN) ; Tavana, M ; Rahmani, M ; Santos Arteaga, F. J ; Sharif University of Technology
Springer London
2016
Abstract
Several methods have been proposed in data envelopment analysis (DEA) for measuring efficiency in problems with interval or ordinal data. In this study, we review the weaknesses and drawbacks of these methods and show how converting ordinal or interval data into precise data can lead to violations of established DEA axioms. One of the axioms violated by these conversion processes is the inclusion of observations axiom, which requires a consistent definition of the production possibility set. We describe the special properties of ordinal and interval data together with their effect on the DEA-based rankings using a theorem and an example. We also propose a new algorithm and apply random...
Efficiency measurement in data envelopment analysis in the presence of ordinal and interval data
, Article Neural Computing and Applications ; Volume 30, Issue 6 , 2018 , Pages 1971-1982 ; 09410643 (ISSN) ; Tavana, M ; Rahmani, M ; Santos Arteaga, F. J ; Sharif University of Technology
Springer London
2018
Abstract
Several methods have been proposed in data envelopment analysis (DEA) for measuring efficiency in problems with interval or ordinal data. In this study, we review the weaknesses and drawbacks of these methods and show how converting ordinal or interval data into precise data can lead to violations of established DEA axioms. One of the axioms violated by these conversion processes is the inclusion of observations axiom, which requires a consistent definition of the production possibility set. We describe the special properties of ordinal and interval data together with their effect on the DEA-based rankings using a theorem and an example. We also propose a new algorithm and apply random...
Development of the group malmquist productivity index on non-discretionary factors
, Article International Journal of Environmental Research ; Volume 3, Issue 1 , 2009 , Pages 109-116 ; 17356865 (ISSN) ; Hosseinzadeh Lofti, F ; Karbassi, A. R ; Roayaei, E ; Nikoomaram, H ; Sharif University of Technology
2009
Abstract
Data envelopment analysis (DEA) measures the relative efficiency of a homogenous set of decision-making units (DMUs) when multiple inputs and outputs are present. The DEA-based Malmquist productivity index measuring the productivity change of DMUs over time has proven itself to be a valid tool to compare group performance. However, in the previous models developed for this purpose, it was supposed that all factors were controllable or discretionary. It is noteworthy that in most real cases, there are some inputs and outputs that are non-discretionary or semi-discretionary. Therefore, the main objective of the present study was to develop the DEA-based Malmquist productivity index on such...
An efficient economic-statistical design of simple linear profiles using a hybrid approach of data envelopment analysis, Taguchi loss function, and MOPSO
, Article Journal of Optimization in Industrial Engineering ; Volume 13, Issue 1 , 2020 , Pages 99-112 ; Ershadi, M. J ; Akhavan Niaki, S. T ; Sharif University of Technology
Qazvin Islamic Azad University
2020
Abstract
Statistically constrained economic design for profiles usually refers to the selection of some parameters such as the sample size, sampling interval, smoothing constant, and control limit for minimizing the total implementation cost while the designed profiles demonstrate a proper statistical performance. In this paper, the Lorenzen-Vance function is first used to model the implementation costs. Then, this function is extended by the Taguchi loss function to involve intangible costs. Next, a multi-objective particle swarm optimization (MOPSO) method is employed to optimize the extended model. The parameters of the MOPSO are tuned using response surface methodology (RSM). In addition, data...
Assessment of modal transportation sustainability: Application of data envelopment and concordance analyses
, Article Iranian Journal of Science and Technology, Transaction B: Engineering ; Volume 31, Issue 2 , 2007 , Pages 179-193 ; 03601307 (ISSN) ; Vaziri, M ; Sharif University of Technology
2007
Abstract
This study tries to characterize national transportation modes to assess balancing and sustainability. Using a pioneer measure for sustainable development (SD), and based on the conformity of the growths of all sectors with transportation modes, the countries are comparatively studied. The proposed measure, elasticity, for each pair of variables indicates the extent to which the two variables have been changing consistently. Indeed the elasticity values are measures of "harmonic development" reflecting sustainability. The study database consisted of key aspects of transportation sustainability in the form of national variables including transportation, economic, social and environmental...
Application of data envelopment analysis in identifying milestones for passenger and freight transportation sustainability
, Article Scientia Iranica ; Volume 12, Issue 4 , 2005 , Pages 426-436 ; 10263098 (ISSN) ; Vaziri, M ; Sharif University of Technology
Sharif University of Technology
2005
Abstract
This study is an attempt to quantify the concept of sustainable transportation. The countries are comparatively studied using a pioneer measure for Sustainable Development (SD) and elasticity, that reflects the conformity and harmony of the growths of all sectors with passenger and freight transportation. Firstly, the elasticity of the non-transportation variables, with respect to passenger and freight transportation ones, were developed. Using individual elasticities, composite sustainability indices were suggested. Then, utilizing the Data Envelopment Analysis (DEA) technique, two composite indices, as well as the national variables, are employed to achieve a unique SD efficiency score....
An appropriate approach for evaluation and optimization of performance Gas Turbo-Compressor Stations
, M.Sc. Thesis Sharif University of Technology ; Eshragh Niaye Jahromi, Abdolhamid (Supervisor)
Abstract
Since early classical theories presented in management, consistently the evaluation of organization as one of the methods of control and planning has been considered. Besides due to intensification of competition among organizations, it is very important to consider performance evaluation as an effective tool in this regard. In this research DEA/AHP approach has been proposed for measuring performance organizations with fractal structure. Thus regardless of other units the first DEA model for evaluation of each pair of units is used and then a matrix of pairwise comparisons is made and the Analytical Hierarchy Process (AHP) model for two-level ranking is used. Finally the mentioned model for...
Power System Restoration Strategies Realizing the Switching Overvoltages
, M.Sc. Thesis Sharif University of Technology ; Vakilian, Mahdi (Supervisor)
Abstract
Since the power systems usually are being operated close to their nominal capacity due to economical reasons, the probability of wide blackouts in power grids have been increased. However by employing suitable strategies the probability of huge blackouts is still very small but if they occur may put the power system operators in trouble while restoring the system. Thus many studies have been conducted in recent years dealing with power system restoration planning to achieve fast and reliable restoration plans. The scope of this project is overvoltage assessment during system restoration. In this manner we can find the optimal strategy with the least overvoltage problems to prevent the...
A method for ranking non-extreme efficient DMUs
, Article CIE 2014 - 44th International Conference on Computers and Industrial Engineering and IMSS 2014 - 9th International Symposium on Intelligent Manufacturing and Service Systems, Joint International Symposium on "The Social Impacts of Developments in Information, Manufacturing and Service Systems" - Proceedings ; Volume 7, Issue 2 , February , 2014 , pp. 618-622 ; ISSN: 18624480 ; Khosravi, Sh ; Sharif University of Technology
Abstract
Data Envelopment Analysis (DEA) is a method to measure the efficiency of a DMU (Decision Making Unit, e.g. school, public agencies and banks). One of the ways for determining rank of DMUs is efficient score of each DMU. An interesting research issues is to discriminate between efficient DMUs. In literatures, supper efficiency is an applicable method for ranking efficient DMUs. The main drawback of this method is an inability of this method to rank non-extreme efficient DMUs. Therefore, this issue reduces the usefulness of this method. In this paper we propose a new ranking system for non-extreme efficient DMUs (Decision Making Units) based upon the omission of DMUs from reference set of the...
Linear modelling and optimization to evaluate customer satisfaction and loyalty
, Article Proceedings - 9th IEEE International Conference on E-Business Engineering, ICEBE 2012, 9 September 2012 through 11 September 2012 ; September , 2012 , Pages 145-150 ; 9780769548098 (ISBN) ; Hussain, O. K ; Faed, M ; Saberi, Z ; Sharif University of Technology
2012
Abstract
In this study, a conceptual framework is postulated to mathematically evaluate and ascertain the hypothesised relationship that perceived value and interactivity has with customer dissatisfaction issues. Then, the relationship between customer satisfaction issues and loyalty and customer acquisition, will be tested to enhance customer satisfaction and loyalty. For the qualitative part of the research, an interview survey was conducted of 40 employees at the Fremantle port of Western Australia and the collected data was analysed using NVivo. In the second data collection phase, a survey questionnaire was distributed to 60 port customers. Using data envelopment analysis (DEA), the important...
An integrated entropy-topsis-dea method to assess the financial strength of construction companies
, Article Construction Research Congress 2016: Old and New Construction Technologies Converge in Historic San Juan, CRC 2016, 31 May 2016 through 2 June 2016 ; 2016 , Pages 321-330 ; 9780784479827 (ISBN) ; Kashani, H ; Naseri, S. F ; Construction Institute (CI) of the American Society of Civil Engineers (ASCE), Construction Research Council; University of Puerto Rico-Mayaguez, Department of civil Engineering and Surveying, Construction Engineering and Management ; Sharif University of Technology
American Society of Civil Engineers (ASCE)
2016
Abstract
This paper proposes a model for a financial assessment of construction companies. This model is derived from the combination of data envelopment analysis (DEA), entropy method (EM), and TOPSIS. In the first step of the model, the financial ratios are calculated based on balance sheets and income statements. In the next step, the 15 ratios are categorized and classified utilizing a combination of TOPSIS and EM methods. Finally, they are aggregated in six indicators. Then, the BCC model of DEA with the type of output-oriented is used for these six indicators to calculate companies' relative efficiency. In the paper's conclusion, the model is examined in 20 construction companies that obtained...
Promotion of low-carbon economy through efficiency analysis: A case study of a petrochemical plant
, Article International Journal of Environmental Research ; Volume 15, Issue 1 , 2021 , Pages 45-55 ; 17356865 (ISSN) ; Abbaspour, M ; Abedi, Z ; Ahmadian, M ; Sharif University of Technology
Springer Science and Business Media Deutschland GmbH
2021
Abstract
Over the past few decades, industrial development has caused a dramatic increment in greenhouse gas (GHG) emissions, as a leading cause of climate change. Modifying the industrial plants' environmental performance is the main pillar of improving efficiency that can reduce the waste of resources and make achieving lower-cost global emission reduction targets of the Kyoto protocol's clean development mechanism (CDM) possible. Considering the essentiality of knowledge-based research in increasing the awareness of policymakers by providing better access to accurate and reliable information, an analytical survey on efficiency in oil, gas, and petrochemical industries has been conducted by...
Performance evaluation of Omni-Channel distribution network configurations considering green and transparent criteria under uncertainty
, Article Sustainability (Switzerland) ; Volume 14, Issue 19 , 2022 ; 20711050 (ISSN) ; Khedmati, M ; Akbari Jokar, M. R ; Babaee Tirkolaee, E ; Sharif University of Technology
MDPI
2022
Abstract
Satisfying customer demand is one of the growing concerns of supply chain managers. On the other hand, the development of internet communications has increased online demand. In addition, the COVID-19 pandemic has increased the demand for online shopping. One of the useful concepts that help to address this concern is the omni-channel strategy, which integrates online and traditional channels with the aim of improving customer service level. For this purpose, this paper proposes an algorithm for evaluating Omni-channel Distribution Network Configurations (OCDNCs). The algorithm applies an extended Data Envelopment Analysis (DEA) model to evaluate OCDNCs based on cost, service, transparency,...