The main goal In this paper is to merge fuzzy DEA with Markowitz model to construct optimized portfolio of efficient companies in Tehran bourse. So, first using of DEA we choose efficient companies as efficient group, although we choose two type of efficient companies w More
The main goal In this paper is to merge fuzzy DEA with Markowitz model to construct optimized portfolio of efficient companies in Tehran bourse. So, first using of DEA we choose efficient companies as efficient group, although we choose two type of efficient companies with adding controlling relative weight constraints for two type of investors ( risk aversive & risk taker ), Then, using of Markowitz model with regarding of the level of risk aversion, we construct efficient portfolio from efficient group.The large number of criteria is one of the MCDM model's problems for solving this problem we can use of factor analysis to reduce a complex data set to a lower dimension. In this paper with respect to experts's opinions,firstly the main variables corresponding to company's efficiency were assigned ( 15 financial ratio ) and then using of factor analysis we reduse the number of these variables to eight, after that with adding controlling relative weight constraints to DEA model, we construct efficient groap for two type of investors ( risk aversive & risk taker ). due to relativeness of risk and return in terms of investors, whit imputing investors to type( risk aversive & risk taker), efficient groaps were constituted. Finaly investor can, with regarding of the level of his risk aversion, using of Markowitz model, construct optimal portfolio from efficient groaps. Though in final step optimal portfolios were choosed from efficient groaps, thus one of the main problem of Markowitz model that is nonregarding other criterion except risk and return, will be soleved
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During the last years, the concept of input congestion and technical ineff-ciency in data envelopment analysis (DEA), have been investigated by manyresearchers. The motivation of this paper is to present models which obtain thedecreased output value due to input conges More
During the last years, the concept of input congestion and technical ineff-ciency in data envelopment analysis (DEA), have been investigated by manyresearchers. The motivation of this paper is to present models which obtain thedecreased output value due to input congestion and technical ineciency. More-over, we extend the models to estimate input congestion, technical ineciencyand output reduction in fuzzy data envelopment analysis, by using the conceptof α-cut sets.
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In the current era, the amazing changes in the management knowledge necessitate the existence of measurement systems so much so that the absence of a measurement system in the different dimensions of an organization such measurement of the use facilities and resources, More
In the current era, the amazing changes in the management knowledge necessitate the existence of measurement systems so much so that the absence of a measurement system in the different dimensions of an organization such measurement of the use facilities and resources, personnel, goals and strategies is considered one of the signs of organization illness. There are different techniques for performance measurement, each of which has strong and weak points. In the present paper, a model for measuring the performance of the bank branches by combining “balance score card” with “fuzzy data envelopment analysis”. The statistical population includes all the branches of Sepah Bank of Tabriz totaling 42. The efficiency measurement indices have been specified through the use of balanced scorecard and with regard to the research literature. For data collection, a researcher – devised questionnaire was used after its validity and reliability had been confirmed. Data envelopment analysis was applied for data analysis. The results show that 10 branches out of the 42 around Tabriz are specified as strongly efficient, 27 as efficient, and the remaining 5 branches as inefficient.
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The tourism industry is one of the most popular industries and it is developing a lot every day, which makes it easy for many tourists and travelers who want to travel all over the world and can travel to anywhere in the world without any problem. Enjoy their journey. K More
The tourism industry is one of the most popular industries and it is developing a lot every day, which makes it easy for many tourists and travelers who want to travel all over the world and can travel to anywhere in the world without any problem. Enjoy their journey. Kermanshah province is one of the national and international tourist attraction centers in Iran. Due to its tourist attractions, it has been hosting a large number of domestic and foreign tourists every year. The tourism industry in Kermanshah province succeeded in using it due to lack of suitable strategies. It is not a desirable potential and it is necessary to provide a solution for developing this industry in Kermanshah province. The present research aims to rank the tourism development strategies of Kermanshah province. The research method is applied in terms of purpose and in terms of collecting survey information. The research sample also includes a sample of 23 experts from the central cultural heritage and tourism departments of the province. The research data were collected using a questionnaire and the SWOT model was used to determine the strategies. The dea-fuzzy method has also been used to rank the strategies. Findings indicate that the number of strengths, weaknesses, opportunities and threats identified in the tourism industry of Kermanshah province is 9,10,8,10, respectively. The current position of Kermanshah Tourism Strategy in the 4th District (Competitive Strategy) was also discussed.
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