Systems and service modeling and simulation
F. S. Gohari; M.J. Tarokh
Abstract
Recommender systems have become fundamental applications in overloaded information domains like e-commerce. These systems aim to provide users with suggestions about items that are likely to be of their interest. Collaborative Filtering (CF) is one of the most successful approaches in recommender systems. ...
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Recommender systems have become fundamental applications in overloaded information domains like e-commerce. These systems aim to provide users with suggestions about items that are likely to be of their interest. Collaborative Filtering (CF) is one of the most successful approaches in recommender systems. Regardless of its success in many application domains, CF has main limitations such as sparsity, cold start, gray sheep and scalability problems. In order to overcome these limitations, hybrid CF systems have been used which combine CF with other recommendation approaches. This paper provides a comprehensive survey of hybrid CF systems; it also provides a classification for these systems, explains their strengths or weaknesses and compares their performance in dealing with the main limitations of CF.
M. Ashoori; M.J. Tarokh
Volume 3, Issue 4 , December 2014, , Pages 57-69
Abstract
Risk is a destructive phenomenon, which is an integral part of any business. Process mining is a form of a business process analysis based on the recorded process data by information systems, whose its aim is to discover process, control, data, organizational and social structures from event logs. A ...
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Risk is a destructive phenomenon, which is an integral part of any business. Process mining is a form of a business process analysis based on the recorded process data by information systems, whose its aim is to discover process, control, data, organizational and social structures from event logs. A process mining project methodology (PMPM) is considered as especially useful in the process mining project, which a comprehensive methodology that can be used as an efficient and effective approach for applying process mining in practice. This methodology made us sure that all important activities are performed and prevented of redundant work. This paper utilizes the PMPM for risk reduction to increase the organization agility against competitors and obtain the more market share. Evaluating the case study results with trace alignment method confirms expert confirmations. Trace alignment shows interesting patterns and provide better insight on process executions.
S. Ghayebloo; M.J. Tarokh; M. Abedzadeh
Volume 2, Issue 4 , December 2013, , Pages 58-71
Abstract
This paper aims to study the impact of product greenness and part reliability on reverse supply chain network through green supplier selection and disassembly of products. It proposes a bi-objective mathematical modeling for a closed-loop supply chain network considering green supplier selection and ...
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This paper aims to study the impact of product greenness and part reliability on reverse supply chain network through green supplier selection and disassembly of products. It proposes a bi-objective mathematical modeling for a closed-loop supply chain network considering green supplier selection and disassembly of products to trade-off profit and greenness. To our knowledge, this study is the first paper which considers the greenness of products in part/components level. So, some important issues such as part reliability, part greenness and inventory management of new and recovered parts are included into the model. Part reliability and part greenness are considered as green criteria in green supplier selection stage. Product greenness is defined according to design for disassembly level. Better design for disassembly means more greenness level for the products and better yield of parts at the disassembly stage. Green parts are made of highly recyclable materials. According to the part greenness and part reliability, some scenarios are defined. The greenness level of product is chosen by the model. ε-constraint method is applied to solve the model. A set of Pareto-optimal solution is obtained by using ε-constraint method to show the trade-off between the profit and greenness objectives. The results showed the efficiency of the model.
A. Mesforoush; M.J. Tarokh
Volume 2, Issue 1 , February 2013, , Pages 30-44
Abstract
It is important to segment the most profitable customers of a company. Many CRM researchers have been performed to calculate customer profitability and develop a comprehensive model of it. This paper with the aid of data mining tools tries to customer segmentation based on kind of RFM. Customers are ...
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It is important to segment the most profitable customers of a company. Many CRM researchers have been performed to calculate customer profitability and develop a comprehensive model of it. This paper with the aid of data mining tools tries to customer segmentation based on kind of RFM. Customers are clustered using K-means and finally calculated CLV. This approach is essential for an SME to be able to provide a personalized service to each customer and to reach customer satisfaction.
E. Teymournejad; M.J. Tarokh
Volume 1, Issue 3 , December 2012, , Pages 48-59
Abstract
Telecommunications play an important role in providing services for citizen and through this study is been trying to use modeling and simulation system for Communications Center (solving failure process) also solving problem, speed of solving the failure, followed by optimization system and offers a ...
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Telecommunications play an important role in providing services for citizen and through this study is been trying to use modeling and simulation system for Communications Center (solving failure process) also solving problem, speed of solving the failure, followed by optimization system and offers a model for managers . Based on this role the manager can use the model that presented above for identifying different strategies then applying best practice for satisfying citizens (citizen relationship management (CIRM). For example, before the occurrence of a repeated failure can identify risky areas and detect them. If we assumed, service provider are as customers that used government services, the managers can evaluate productivity of service providers and choose the right reward system or the decision for using more service providers. No technical managers can use this model Because of its simple structure. The above system has been simulated with the Arena software and because the system simulation credit on random numbers we have used the data registered in the system for probability distribution function.
