Data Envelopment Analysis
Mohammad Fallah; Esmaeil Najafi
Volume 12, Issue 1 , Spring 2020, Pages 1-9
Abstract
Performance measurement is always one of the most important tasks of managers, so knowledge management is measurement knowledge, and if we can measure something, we can no doubt control it, and therefore we cannot manage it. In this paper, according to the Malmquist productivity index, an index is used ...
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Performance measurement is always one of the most important tasks of managers, so knowledge management is measurement knowledge, and if we can measure something, we can no doubt control it, and therefore we cannot manage it. In this paper, according to the Malmquist productivity index, an index is used to determine the progress and regress of a unit. This index is defined by the boundary changes resulting from the inputs of the units and their efficiency changes, which we call the Malmquist Productivity Index. After calculating the Malmquist changes, we were able to determine the rate of increase or decrease in the indicators for the following period.
Data Envelopment Analysis
Hadi Shirouyehzad; Javid Jouzdani; Mazdak Khodadadi-Karimvand
Volume 12, Issue 1 , Spring 2020, Pages 11-19
Abstract
The COVID-19 pandemic has affected many people around the globe. Europe, as one of the most seriously affected continents, has been struggling with the novel coronavirus for several months. Obviously, outbreak response management plays a critical role in the impact of the disease. Therefore, in this ...
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The COVID-19 pandemic has affected many people around the globe. Europe, as one of the most seriously affected continents, has been struggling with the novel coronavirus for several months. Obviously, outbreak response management plays a critical role in the impact of the disease. Therefore, in this paper, Malmquist Productivity Index is used to evaluate the performance of the most severely affected European countries based on the average contagion rate. The results rank the countries and provides insight for the future.
abbas shahnavazi; Mehran Nemati Gonbaghi; Seyedeh Faezeh Teymouri; Bahman Ghasemi dakdare
Volume 12, Issue 1 , Spring 2020, Pages 21-32
Abstract
Nowadays, increasing competition among companies and the huge cost of attracting new customers has led to companies seeking to retain existing customers rather than looking to attract new customers. These factors together have led to the emergence of customer relationship management. Thanks to the development ...
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Nowadays, increasing competition among companies and the huge cost of attracting new customers has led to companies seeking to retain existing customers rather than looking to attract new customers. These factors together have led to the emergence of customer relationship management. Thanks to the development of information and communication technology, especially the Internet, the use of customer relationship management has expanded and facilitated, and electronic customer relationship management has been formed. Customer Relationship Management (EMS) seeks to deepen and empower customer relationships by utilizing a variety of information and communication technologies such as websites. With the aim of identifying key indicators of performance and improving the performance of the Balanced Scorecard, this research paper has attempted to integrate it with Yager’s Fuzzy screening technique. This integrated model was implemented to develop a balanced scorecard for customer relationship management evaluation of companies covered by Parsian Data-Processors Group. The scale of “very important” was set as an acceptable scale for going through the screening process and for agreeing between managers and experts on the most important indicators. The results showed that the five indicators of customer viewpoint including increasing customer support during Purchasing Process and Afterward, Increasing Brand Confidence and Credibility , Participating in the Online Environment, Enhancing Customer Service After Sales, Increasing Customer Satisfaction, Increasing Site Usage and Various Site Capabilities, the four indicators of learning and innovating viewpoint including continuous improvement and modernization of the company's current services, the ability to use the new technologies, knowledge management capabilities in the organization and the ability of the company to learn from the market and to react it, the four indicators of financial viewpoint including Increased profitability; Increased share of online sales, flexibility in financing and increased annual sales , and the four indicators of exchange (processes) viewpoint including increased software update, increased use of advanced technologies compared to competitors; increased and improved use of Technology and Increasing Diversity of Services Offered on the Site (E-mail) have extracted as Key Indicators of Balanced Card Relationship Management Evaluation.
Operation Research
Nasiru Salihu; Mathew Remilekun Odekunle; Mohammed Yusuf Waziri; Abubakar Sani Halilu
Volume 12, Issue 1 , Spring 2020, Pages 33-44
Abstract
There exist large varieties of conjugate gradient algorithms. In order to take advantage of the attractive features of Liu and Storey (LS) and Conjugate Descent (CD) conjugate gradient methods, we suggest hybridization of these methods in which the parameter is computed as a convex combination ...
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There exist large varieties of conjugate gradient algorithms. In order to take advantage of the attractive features of Liu and Storey (LS) and Conjugate Descent (CD) conjugate gradient methods, we suggest hybridization of these methods in which the parameter is computed as a convex combination of and respectively which the conjugate gradient (update) parameter was obtained from Secant equation. The algorithm generates descent direction and when the iterate jam, the direction satisfy sufficient descent condition. We report numerical results demonstrating the efficiency of our method. The hybrid computational scheme outperform or comparable with known conjugate gradient algorithms. We also show that our method converge globally using strong Wolfe condition.
Mehrzad Abdolahzadeh Laleh Dashti; Mehrdad Goudarzvand Chegini; Hamidreza Rezaei Kelidbari
Volume 12, Issue 1 , Spring 2020, Pages 45-53
Abstract
Authentic leadership is a pattern of leadership behavior that, by possessing positive psychological abilities, can create a special place for service organizations. The purpose of this study was to identify and prioritize the factors influencing the establishment of authentic leadership in the University ...
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Authentic leadership is a pattern of leadership behavior that, by possessing positive psychological abilities, can create a special place for service organizations. The purpose of this study was to identify and prioritize the factors influencing the establishment of authentic leadership in the University of Medical Sciences through hierarchical analysis. The purpose of the study is practical and based on qualitative-quantitative approach. The statistical population of the study consisted of Philosophers of Management and Experimental Experts at the University of Medical Sciences who were selected by purposeful sampling and snowball technique until theoretical saturation was reached. The data collection tool was semi-structured interview. Based on the theme analysis technique, MAXQDA11 software identified effective factors on authentic leadership approach and then identified the factors identified by AHP using Expert Choice11 software. The findings showed that among the 13 effective factors considered by experts, the factor of supportive authenticity has the most influence on the implementation of authentic leadership approach in medical sciences university and economic conditions have the least weight or importance. Based on this, it is possible to establish a authentic leadership approach in the University of Medical Sciences by establishing a flexible, service-oriented and flexible structure, in addition to creating a transparent and reliable atmosphere.
Hassan Zarei; Ali Zafari
Volume 12, Issue 1 , Spring 2020, Pages 55-62
Abstract
In this paper, we present a spectral method for approximating the boundary optimal control problems of a well-known wave equation by the linear optimal control problems. The method is based upon constructing the Mth degree interpolation polynomials, using Chebyshevs nodes, to approximate the wave equation. ...
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In this paper, we present a spectral method for approximating the boundary optimal control problems of a well-known wave equation by the linear optimal control problems. The method is based upon constructing the Mth degree interpolation polynomials, using Chebyshevs nodes, to approximate the wave equation. Necessary conditions for optimal control functions are obtained by using the Pontryagin's maximum principle. Moreover, the control parameterization enhancing technique (CPET) is used to obtain the piecewise constant sub-optimal control functions. Finally, the efficiency of the proposed method is confirmed by a numerical example.
Operation Research
Ali Aranizadeh; Mehrzad Kazemi; Homayoun Barahmandpour; mirpouya mirmozaffari
Volume 12, Issue 1 , Spring 2020, Pages 63-71
Abstract
These days, as the residents of urban areas grow, the requirement for consumption rises too. This quantity of consumption needs power generation cores with large volume utilizing that it needs to be big enough which guides technology in the direction of wholesale power transmission systems. Consequently, ...
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These days, as the residents of urban areas grow, the requirement for consumption rises too. This quantity of consumption needs power generation cores with large volume utilizing that it needs to be big enough which guides technology in the direction of wholesale power transmission systems. Consequently, two kinds of power transmission systems including HVDC and EHVAC can be considered. However, since none of the aforementioned technologies has been used in developing countries, a decision should be made to present and progress any of these technologies. Applying both of these technologies concurrently would not be economic. Therefore, this paper studies deciding on the introduction and development of HVDC and EHVAC in a developing country, Iran. A decision-making development needs the principles of conflicting purposes for alternatives and the selection of the best alternative based on the needs of decision-makers. Multi-objective optimization methods may well provide a solution for this selection. To this end, measures of this selection are described in more specifics and then, MULTIMOORA, one of the recognized MCDM approaches, is used to make the ultimate result.
Mojtaba Roshani Delivand; seyed mahmood Shabgoo monsef
Volume 12, Issue 1 , Spring 2020, Pages 73-82
Abstract
The purpose of this study was to evaluate the effect of environmental performance mediator role on the effect of green supply chain management on export performance of exporting companies in Guilan province. The purpose of the study is applied and descriptive - survey type. The statistical population ...
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The purpose of this study was to evaluate the effect of environmental performance mediator role on the effect of green supply chain management on export performance of exporting companies in Guilan province. The purpose of the study is applied and descriptive - survey type. The statistical population of the study consisted of the selected exporting companies in Guilan province in the year 1977. The data collection tool was a standard questionnaire whose validity was confirmed by content validity and its reliability by Cronbach's alpha test. Structural equation modeling based on partial least squares approach was used for data analysis by Smart PLS3 statistical software. The findings showed that green supply chain management has a positive and significant effect on environmental performance and export performance of exporting companies in Guilan province. The impact of environmental performance on export performance of exporting companies was also confirmed. The mediating role of environmental performance on the impact of green supply chain management on export performance of exporting companies of Guilan province was also proved. Overall, it can be said that by improving environmental performance, the impact of green supply chain management on the export performance of exporting companies in Guilan province will improve.
Numerical Analysis
Babatunde Morufu Yisa
Volume 12, Issue 1 , Spring 2020, Pages 83-90
Abstract
Adomian decomposition method and He’s variational Iteration method are applied to nonlinear oscillator problems that involve conservative type of oscillators. The methods proved to be effective for the general and specific cases due to their algorithms that admit nonlinear terms in the problems. ...
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Adomian decomposition method and He’s variational Iteration method are applied to nonlinear oscillator problems that involve conservative type of oscillators. The methods proved to be effective for the general and specific cases due to their algorithms that admit nonlinear terms in the problems. The two methods are tested on some specific problems in the literature, and the results obtained compared favourably with those obtained via the use of Energy balance method.
Strategic Management
Reza Khezrdoust; Narges Delafrouz
Volume 12, Issue 1 , Spring 2020, Pages 91-101
Abstract
The purpose of this study was to investigate and evaluate the factors affecting the failure of strategic management in large companies. The research is an applied and descriptive-survey target. The statistical population of the study consisted of all experts and experts of the telecommunication company, ...
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The purpose of this study was to investigate and evaluate the factors affecting the failure of strategic management in large companies. The research is an applied and descriptive-survey target. The statistical population of the study consisted of all experts and experts of the telecommunication company, which numbered 191 people. In total, 191 persons were selected as sample. The data gathering tool was a researcher-made questionnaire whose reliability was confirmed by Cronbach's alpha and its validity was verified by face validity. In order to analyze the data in the descriptive statistics section, statistical software SPSS23 was used and in inferential statistics, Structural Equation Modeling was applied using Lisrel 8.80 statistical software. The research findings showed that factors such as: rapid change of conditions and inability to manage change, imbalance between current business and the strategy of informal groups, lack of correct identification of bottleneck, lack of key competencies, attachment to past strategy, inappropriate communication of the program with The prospect, lack of laws and mechanisms for identifying and solving executive problems, and inadequate training and guidance are among the most important factors affecting the failure of strategic management in the telecommunications company. Among the known factors, the greatest effect on the failure to properly identify the throat is 0.44 It should be. Accordingly, strengthening the skills of strategic managers and planners in identifying organizational bottlenecks and barriers is essential.
Operation Research
Reza Babazadeh
Volume 12, Issue 1 , Spring 2020, Pages 103-113
Abstract
Todays, industries are seeking the ways to improve their competitiveness and responsiveness in order to achieve the most share of markets and customer satisfaction. Optimization of strategic and tactical decisions in a logistics network would improve total performance of the supply chain in a long term ...
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Todays, industries are seeking the ways to improve their competitiveness and responsiveness in order to achieve the most share of markets and customer satisfaction. Optimization of strategic and tactical decisions in a logistics network would improve total performance of the supply chain in a long term planning horizon. This paper presents a Mixed-integer linear programming (MILP) model to optimize logistics networks under real limitations such as demand, capacity, and budget constraints. Due to NP-hard nature of the proposed model a Differential Evolutionary (DE) algorithm is proposed to solve the large sizes of the presented model in reasonable time. Finally, the computational results obtained through the DE algorithm are compared with the solutions obtained by GAMS optimization software. The results reveal that the proposed methodology is an efficient tool to optimize large scale logistics networks.
Data Envelopment Analysis
Mohsen Vaez-ghasemi; Zohreh Moghaddas; Hamid Askari; Feloora Valizadeh
Volume 12, Issue 1 , Spring 2020, Pages 115-137
Abstract
Today, many activities from businesses to engineering design, routing on the Internet, and even routing of foodstuff trucks require programming and optimization. Many of these problems have no determinate solution and cannot be solved easily. To solve these problems, algorithms have been developed inspired ...
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Today, many activities from businesses to engineering design, routing on the Internet, and even routing of foodstuff trucks require programming and optimization. Many of these problems have no determinate solution and cannot be solved easily. To solve these problems, algorithms have been developed inspired by nature based on particle intelligence, biological, physical, and chemical systems, and even human communities and have been named after their inspiration source. A metaheuristic optimization algorithm is an innovative way that can be applied to various optimization problems by slight modifications. These algorithms can improve the capability of finding high-quality answers for difficult optimization problems significantly. The present paper reviews the application of various metaheuristic algorithms and data envelopment analysis (DEA) to optimization problems in the literature published in recent years. Descriptions are provided about the application of metaheuristic algorithms in DEA along with their applications, the field of activity, overlaps, and the integration of these two robust methods to find the optimal answer.
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