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A Novel Linear Mathematical Model for Manufacturing Service Composition Problem Focusing on Reliability

Mahroo, Fatemeh | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53236 (01)
  4. University: Sharif University of Technology
  5. Department: Industrial Engineering
  6. Advisor(s): Houshmand, Mahmoud; Fatahi Valilai, Omid
  7. Abstract:
  8. Nowadays, in a highly competitive and rapidly growing manufacturing environment, firms and their manufacturing processes are compelled to be agile, dynamic, and productive. On the other hand, in the last century, the continuous growth of IT has led to emergence of innovative and essential technologies such as the Internet, cloud computing, and the Internet of Things. The integration of mentioned technologies in manufacturing has turned its structure from product-oriented to service-oriented. Also, the personalized services and resources, with limited capacity, have made the manufacturing processes more complicated. As a new generation of manufacturing systems, cloud manufacturing has provided a platform for the convergence of physical resources and costumers' various demands. With the benefit of new technologies through the sharing of existing capacities and making the manufacturing process smarter, the efficiency and sustainability of service and production have increased. As a critical issue in cloud manufacturing, service composition has attracted the researchers' attention. Since this problem is an NP-hard problem, finding a suitable solution is challenging. Also, by applying Quality of Services (QoS) for assessing the performance of the selected service composition in cloud manufacturing, the challenges grow. Many factors, such as cost, time, reliability, and etcetera, play a significant role in QoS. Reliability, one of the critical factors, has attracted less attention in the literature. Hence, as the main objective of this research, a new model is developed for a consecutive structure of services, considering the reliability alongside cost and time. Therefore, the developed model has a nonlinear objective function that, in some cases, finding an optimal solution will be difficult. Therefore, a proposed model for linearization of reliability factor is considered to facilitate finding the optimal solution. Moreover, a new definition of cost with reliability consideration is proposed. This definition helps to embed the cost role with considering reliability context for finding a rational relation between the cost parameters and the reliability of the service composition. Then, the developed model is verified by determining different examples. According to the results, the service providers should be determined by considering their reliability factors although the time of service fulfilment is increased
  9. Keywords:
  10. Cloud Manufacturing ; System Reliability ; Service Composition ; Service Quality ; NP-Hard Problems ; Invariance

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