نتایج جستجو برای: data envelopment analysis multi

تعداد نتایج: 4773005  

Journal: :international journal of mathematical modelling and computations 0
a. masoumzadeh islamic azad university of central tehran, tehran iran, islamic republic of department of applied mathematics n. moradmand rad islamic azad university of lahidjan, lahidjan iran, islamic republic of department of applied mathematics

resource allocation and optimal leveling are among the top challenges in project management. this paper presents a dea-based procedure for determining an optimal level of inputs to produce a fixed level of outputs. to achieve this goal, we assume that the levels of outputs can be forecasted in the next season and the procedure will determine optimal level of inputs for all dmus. such as some of...

Journal: :international journal of data envelopment analysis 0
mohd rizwanullah associate professor, department of mathematics and statistics, manipal university jaipur, rajasthan, india

data envelopment analysis (dea) was developed to help compare the relative performance of decision-making units. it is a non-parametric method for performing frontier analysis. it uses linear programming to estimate the efficiency of multiple decision-making units and it is commonly used in production, management and economics [3]. dea generates an efficiency score between 0 and 1 for each unit...

Journal: :international journal of data envelopment analysis 0
n. ghasemi e. najafi h. shams

recently the concept of facility efficiency, which defined by data envelopment analysis (dea), introduced as a location modeling objective, that provides facilities location’s effect on their performance in serving demands. by combining the dea models with the location problem, two types of “efficiencies” are optimized: spatial efficiency which measured by finding the least cost location and al...

Journal: :international journal of data envelopment analysis 0
m .eyni department of mathematics, university of payam noor, tehran, iran. m .maghbouli departement of mathematics, islamic azad university, hadishahr branch, hadishahr, iran.

data envelopment analysis (dea) as a non-parametric method for efficiency measurement allows decision making units (dmus) to select the most advantageous weight factors in order to maximize their efficiency scores.  in most practical applications of dea presented in the literature, the presented models assume that all inputs are fully desirable. however, in many real situations undesirable inpu...

Journal: :iranian journal of public health 0
mohsen barouni mohammad reza amiresmaieli arash shahravan saeed amini

background: during the last decades, the number of dentistry units increased significantly across the country. the aim of this study was to assess the efficiency of dental units of iran provinces regarding dental health inputs and outputs using data envelopment analysis approach. methods: in this applied descriptive-analytical study, the study population included all of iran 31 provinces. the o...

Journal: :CEJOR 2011
Najmeh Malekmohammadi F. Hosseinzadeh Lotfi Azmi Jaafar

In the existing DEA models, we have a centralized decision maker (DM) who supervises all the operating units. In this paper, we solve a problem in which the centralized DM encounters limited or constant resources for total inputs or total outputs. We establish a DEA target model that solves and deals with such a situation. In our model, we consider the decrease of total input consumption and th...

Journal: :international journal of data envelopment analysis 2013
m. sanei s. mamizadeh-chatghayeh

over the years we have witnessed the growing importance of supply chain operations and supply chain management (scm), as supply chains play a major role in every step of the product life cycle. therefore, this paper will dea-based performance evaluation approaches for overall supply chain can be categorized. future perspectives and challenges are discussed

Journal: :بین المللی مهندسی صنایع و مدیریت تولید 0
amirsaman kheirkhah bu-ali sina university, faculty of engineering, industrial engineering department, hamedan, iran hassan zolfaghari bu-ali sina university, faculty of engineering, industrial engineering department, hamedan, iran

in this paper, a discrete event simulation model of iranian railway system is used for analyzing performance of the system in freight sector. the model analysis shows more sensitivity of the system on loading and unloading facilities than on number of wagons and locomotives. system optimization through simulation optimization technique, shows that more than 4% of all wagons available in the net...

A. Mahmoodi Rad M. Sanei R. Dehghan

In original Data Envelopment Analysis (DEA) models for measuring the relative efficiencies of a set of Decision Making Units (DMUs) using various inputs to produce various outputs are limited to crisp data. To deal with imprecise data, the notion of fuzziness has been introduced. this paper develops a procedure to measure the efficiencies of DMUs with fuzzy observations. The basic idea is to tr...

Journal: :International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems 2021

In this paper, we reformulate the conventional DEA models as an imprecise problem and propose a novel method for evaluating DMUs when inputs outputs are fuzzy and/or ordinal or vary in intervals. For purpose, convert all data into interval data. order to each number data, use nearest weighted approximation of numbers by applying weighting function, one. manner, could The presented determine eff...

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