Suchergebnisse

Supplier selection is an important business decision. Beside traditional management criteria the environmental aspects are getting often recognition. In this paper the method of Data Envelopment Analysis (DEA) is used to study the extension of traditional supplier selection methods with environmental factors. The focus will be on the weight selection process which can control the selection. In this method we divide the criteria in two manners: the traditional and environmental (green) factors. Then with the help of DEA we are searching a weight system with which the environmental criteria can influence the decision with a representation of the green factors. To choose the mentioned weight system, we apply DEA (Data Envelopment Analysis) with common weights analysis (CWA) method. In this case of DEA/CWA the common weights are calculated with a linear programming problem.

Transport is one of the most essential sectors of the EU member state economies. Measurement of the efficiency of transport operations seems to be interesting from the perspective of both the economy as a whole and individual companies operating in the transport sector. The largest proportion of freight transport in the European Union is done by road. The purpose of this paper is to determine the efficiency of road and rail freight transport in old and new European Union countries based on the data envelopment analysis (DEA) method. To that end, the authors present a literature review reflecting the current state of research on the importance of transport and its development in relation to the economy and environmental problems. Additionally, the methods of data analysis and variables are described. The empirical part is divided into a presentation of DEA results and correlation between the transport efficiency, gross domestic product (GDP), and CO 2 emissions results. Moreover, spatial analysis was used to characterize road and rail transport efficiency in EU member states. The last section gives a summary of the study, and the obtained results are compared with data from the literature review

AbstractIn England and Wales, recent droughts and the future threat posed by climate change has intensified the debate on the suitability of either resource‐development or demand‐management approaches to ensure that supply and demand are kept in balance. The need to reduce leakage from water distribution systems has gained almost universal acceptance, and discussion now centres on what should be included in the cost‐benefit analysis in determining that economic level of leakage.This paper (a) reviews the role of the Environment Agency in leakage control and the current thinking on the economic level of leakage, (b) argues the case for the inclusion of environmental costs and benefits, and (c) explores some of the reasons why water companies appear to be reluctant to pursue the goal of further leakage reduction.