INNOVATION MANAGEMENT AND OPERATIONAL STRATEGIES
Year:2020 | Volume:1 | Issue:1|Papers Count:7

Purpose: Using the data envelopment analysis method to determine the most efficient companies listed on the Tehran Stock Exchange. Methodology: In this study, three industries of banking, petrochemical and pharmaceutical have been studied to determine efficient companies. Then, using the ideal planning method, the investment percentage of each company's share in the portfolio is calculated. In this method, once the return and share risk as model variables and with another liquidity variable is added to them. Findings: The results showed that after ranking the companies, their sensitivity can be analyzed and by determining the weaknesses and recognizing the impact of variables, to increase the efficiency of companies. Originality/Value: Using the portfolio of efficient companies for investment leads to reducing investment risk and choosing the right portfolio.

Purpose: Choosing a set of suppliers is critical to the success of organizations. In recent years, much attention has been paid to the importance of selecting suppliers. Effective selection and evaluation of suppliers is an important responsibility that should always be considered by purchasing managers. The criticality of supplier selection is due to the effects it has on elements related to the end products of organizations. Suppliers are a vital part of an organization that can have a huge impact on an organization's performance. Methodology: In this study, a data set containing the specifications of 18 suppliers. First, the performance of suppliers is calculated from both optimistic and pessimistic perspectives in the presence of undesirable outputs and inaccurate data, and the interval ranking method is used to identify the supplier with the best performance. Findings: The results showed that the traditional DEA method measures only the best relative efficiency of a group of decision-making units while avoiding pessimistic performance. In order to make the best use of DEA and avoid complex mental calculations, the DEA method for dual boundaries was used. Originality/Value: This paper uses interval ranking and data envelopment analysis with dual boundaries in the presence of undesirable outputs and inaccurate data. In this paper, it is suggested that the calculation of overall efficiency and ranking of suppliers in the model proposed by Azizi et al. (2016) integrate both performance in the form of an interval and the overall efficiency and ranking of units based on Hosseinzadeh et al. (2018) ranking method.

Purpose: Cost efficiency evaluation in a network system using data envelopment analysis models can be improved from variety of aspects that exist in real world applications. In this study it is aimed to consider a specific set of weights for cost efficiency assessment in a two-stage network system. Methodology: Using data envelopment analysis techniaque it is tried to provide a model for cost evaluation of a network system. Findings: Considering the relations among different stages in a network system can directly affect the obtained results. This issue is investigated from cost efficiency evaluation. Considering the set of wights from different aspects can affect the obtained scores. Originality/Value: According to the models and methods exist in the DEA literature, in this study a model is presented to consider cost efficiency in a two-stage DEA model.

Purpose: Cost efficiency evaluation in a network system using data envelopment analysis models can be improved from variety of aspects that exist in real world applications. In this study it is aimed to consider a specific set of weights for cost efficiency assessment in a two-stage network system. Methodology: Using data envelopment analysis techniaque it is tried to provide a model for cost evaluation of a network system. Findings: Considering the relations among different stages in a network system can directly affect the obtained results. This issue is investigated from cost efficiency evaluation. Considering the set of wights from different aspects can affect the obtained scores. Originality/Value: According to the models and methods exist in the DEA literature, in this study a model is presented to consider cost efficiency in a two-stage DEA model.

Purpose: The purpose of this paper is to assess the efficiency of existing companies in Iran's insurance industry and its relationship with important profitability ratios. Therefore, with the help of input-axis and output-axis approaches, the performance of the companies was investigated and then the relationship between profitability and efficiency was investigated using Tobit's regression model. Methodology: To achieve the answer to the above question, 14 insurance companies in the capital market of Tehran were selected as statistical samples. The data collected in a 10-year period between 2012 and 2018 have been considered and the hypothesis test has been performed by considering the dependent variable of dividend in different forms through tobit and logit regression analysis. Findings: The results confirm that during the six-year period (2011 to 2016), the return on assets with a calculated efficiency is positively correlated with the input-oriented approach and has a negative relationship with the output-oriented approach. The results also show that the return on equity does not have any significant relationship with any of the two performance approaches. Originality/Value: In this study, considering the ratio of total liabilities, equity and assets as input variables and income and sales, premium, net profit as output variables, the ability to aggregate these items and translate them into one It has a single criterion called "efficiency" with two approaches.

Performance Evaluation of Construction Projects Based on Identified and Clustered Barriers Using Data Envelopment Analysis; a Case Study: Projectds of Execution Departemant of Bonyad Maskan Chaharmahal and Bakhtiari Province To improve and prepare the urban spaces, ways and connecting roads will have a great impact on the society’ s improvement and progress. Every year, thousands of projects are done all around the world and they are mostly successfully completed and in some cases, they face various problems. Executing the project stages, there are some factors which lead the project planning to be failed or the might cause the time and cost to be wasted. There are various reasons which cause these factors to be created while the project passes the completion stages such as the contract controversies, contractors’ inability, lack of personnel’ s sufficient skills and knowledge, uncooperative of the personnel. Purpose To evaluate the performance of construction projects based on identified and clustered implementation barriers using data envelopment analysis.

Purpose: The purpose of this study is to investigate the impact of the financial crisis on the investment fund industry using dynamic evaluation and comparing the performance of investment funds in different years from 2012 to 2017. Value-based data envelopment analysis is used to evaluate the performance of decision-making units (investment funds) and to present changes in performance throughout the year. Methodology: In terms of classification based on the purpose of this research is of the applied type, the purpose of which is to develop applied knowledge in a specific field. This research is of library type in terms of research design. It has been used in order to collect research data by referring to the information contained in historical financial statements. Also, this research is descriptive-correlational in terms of data collection and inference. Findings: The study of various models of data envelopment analysis method as well as the types of inputs and outputs of data envelopment analysis method for evaluating mutual funds have been discussed. Since the investment policies of the funds are different from each other, the tools obtained are also different from each other. Therefore, it can be useful to use a tool such as the data envelopment analysis method that examines the units under study under the same conditions. One of the tools that can be used for this purpose is the data envelopment analysis method because DEA is a non-parametric method. It considers the relationship between product outputs and its inputs and defines the boundary of efficiency. The efficiency threshold can be considered as a measure of performance in investment analysis. Originality/Value: The issue is related to the events that have taken place in the country, which are strongly affected by the economic recession and the banking system, which mainly include sanctions and the global financial crisis and liquidity fluctuations and exchange rate fluctuations; therefore, the conclusions in this study will be potentially useful for fund managers and investors.