Energy efficiency and production technology heterogeneity in China: A meta-frontier DEA approach

2013 ◽  
Vol 35 ◽  
pp. 283-289 ◽  
Author(s):  
Qunwei Wang ◽  
Zengyao Zhao ◽  
Peng Zhou ◽  
Dequn Zhou
Author(s):  
Mohd Afjal ◽  
Kavya C S

This study uses the Data Envelopment Analysis (DEA) slack-based model (SBM) and Malmquist Productivity Index (MPI) to evaluate energy efficiency based on CO2 emissions in 42 countries belonging to 6 continents. First, the data envelopment analysis was employed to calculate the efficiency scores for the countries individually and continent basis and then Malmquist index was used to examine the improvement. The study period chosen was 2011-2020. The results of this study showed that on the basis of continents there has been fluctuations in energy efficiency except for Australia, with an efficiency score of equal to one throughout the study period. Additionally, from the results of Malmquist Productivity Index it was found that the 42 countries showed no significant energy enhancement during the period of 2011-2020. KEYWORDS: Energy Efficiency, CO2 emissions, Continents, Data Envelopment Analysis, Malmquist Productivity Index


2014 ◽  
Vol 6 (8) ◽  
pp. 5476-5492 ◽  
Author(s):  
Qunwei Wang ◽  
Peng Zhou ◽  
Zengyao Zhao ◽  
Neng Shen

Author(s):  
L. R. Mukhametova ◽  
I. G. Akhmetova ◽  
D. A. Zaripova ◽  
A. R. Nurislamova

THE PURPOSE. Consider the introduction and implementation of lean production technology in the branches of OOO Tatneft - AZS Center. Describe the essence of the technology, consider the problems, the complexity of implementation and propose an algorithm for introducing the technology and involving each employee in the process of optimizing the business and maximizing customer focus. METHODS. At the initial stage, it was decided to start implementing the Lean philosophy with two of its tools: kaizen and 5S. Using the philosophy of continuous improvement Kaizen, a system of kaizen sentences was developed and formalized. In order to provide material incentives for employees at each workplace, the Regulation on the system of continuous improvement of the production system of OOO Tatneft-AZS Center was adopted, which regulates and regulates the process of submitting and evaluating kaizen proposals. For the implementation of the 5S system, the standard "Application of the 5S system in the organization of a workplace" was developed, discussed in all labor collectives and adopted, on the basis of which the implementation of the 5S system was started in all branches of OOO Tatneft-AZS Center. RESULTS. The article describes the use of a fairly wide and varied range of Lean manufacturing tools: kaizen proposals, 5C, standardization, TPM, visualization, SFM-visual management, value stream maps. The tools differ in both the time and duration of implementation and their effectiveness. CONCLUSION. Within the framework of adapting the principles of Lean production to the retail and sales network of oil products of OOO Tatneft-AZS Center, the primary factors are industry and organizational specifics.


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