Results 31 to 40 of about 88,346 (265)

Assessing the efficient cost of sustaining Britain's rail network: Perspectives based on zonal comparisons [PDF]

open access: yes, 2004
The objective of this paper is to inform the debate on how efficiency targets for Network Rail (formerly Railtrack) should be set during the 2002/03 Interim Review and beyond.
Kennedy, J, Smith, ASJ
core   +2 more sources

Agricultural Green Ecological Efficiency Evaluation Using BP Neural Network–DEA Model

open access: yesSystems, 2023
The evaluation of agricultural green ecological efficiency can reflect the capacity of agriculture for sustainable development and reduce the endogenous pollution caused by agricultural waste in order to alleviate the weakening of agricultural ecosystems.
Qiang Sun, Yu-Jiao Sui
doaj   +1 more source

Efficiency evaluation of wheat farming: a network data envelopment analysis approach [PDF]

open access: yesJournal of Optimization in Industrial Engineering, 2016
Traditional data envelopment analysis (DEA) models deal with measurement of relative efficiency of decision making units (DMUs) in which multiple-inputs consumed to produce multiple-outputs.
Reza Kazemi Matin, Roza Azizi
doaj   +1 more source

An agent-based dynamic information network for supply chain management [PDF]

open access: yes, 2004
One of the main research issues in supply chain management is to improve the global efficiency of supply chains. However, the improvement efforts often fail because supply chains are complex, are subject to frequent changes, and collaboration and ...
Ahn, H, Lee, H
core   +2 more sources

Network DEA 모형과 DEA-window 분석을 이용한 저비용항공사 효율성 분석

open access: yesJournal of the Aviation Management Society of Korea, 2019
본 연구는 Network DEA와 DEA-window 모형을 이용하여 국내 저비용항공사의 정태적/동태적 효율성을 분석하였다. Network DEA는 전통적인 DEA모형의 단점을 보완하는 방법으로 중간과정에 숨어있는 변환과정을 설명할 수 있다. DEA-window모형은 다기간에 걸친 동태적 효율성을 분석할 수 있는 방법이다. 실증 분석을 위하여 국내 5개 저비용항공사(티웨이항공, 제주항공, 진에어, 이스타항공, 에어부산)를 분석대상으로 선정하였고, 분석기간은 2013년부터 2017년까지이다. Network DEA모형의 1단계 투입변수는 매출원가, 산출변수는 ASK이고, 2단계 투입변수는 ASK와 판매관리비, 산출변수는 RPK이다.
null 김수영, null Moon-Gil Yoon
openaire   +1 more source

A Review of Data Envelopment Analysis in Airline Efficiency: State of the Art and Prospects

open access: yesJournal of Advanced Transportation, 2021
The rapid development of the aviation industry has brought about the deterioration of the climate, which makes airline efficiency become a hot issue of social concern. As an important nonparametric method, Data Envelopment Analysis (DEA), has been widely
Qiang Cui, Li-Ting Yu
doaj   +1 more source

EFFICIENCY MEASUREMENT OF NDEA WITH INTERVAL DATA [PDF]

open access: yesInternational Journal of Mathematical Modelling & Computations, 2016
Data envelopment analysis (DEA) is a non-parametric technique for evaluation of relative efficiency of decision making units described by multiple inputs and outputs. It is based on solving linear programming problems. Since 1978 when basic DEA model was
S. Keikha- Javan, M. Rostamy-Malkhalifeh
doaj  

Cost efficiency and return to scale in a two-stage network supply chain: Case study of drink companies in Iran [PDF]

open access: yesمجله مدل سازی در مهندسی, 2018
Data Envelopment Analysis (DEA) is a powerful tool to evaluate the performance of decision-making units. Some of decision- making units consist of several parts or stages that make a network of sub-processes.
amir rahimi   +1 more
doaj   +1 more source

Transport Accessibility In Light Of The DEA Method [PDF]

open access: yes, 2014
The development of transport infrastructure and increasing the efficiency of transport services are major factors of economic growth. The concept of transport accessibility can be analysed in various aspects.
Górniak, Joanna
core   +2 more sources

Nonlinear genetic-based model for supplier selection: a comparative study

open access: yesTechnological and Economic Development of Economy, 2017
Evaluation and selection of candidate suppliers has become a major decision in business activities around the world. In this paper, a new hybrid approach based on integration of Gene Expression Programming (GEP) with Data Envelopment Analysis (DEA) (DEA ...
Alireza Fallahpour   +3 more
doaj   +1 more source

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