O. Feyzioğlu; "A Simulation-Based Optimization Approach...", June 7,06
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  • O. Feyzioğlu; "A Simulation-Based Optimization Approach...", June 7,06

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Faculty of Engineering and Natural Sciences
IE 551 - Graduate Seminar

 Orhan Feyzioğlu
Department of Industrial Engineering
Galatasaray University

Abstract:  The problem of sizing the resources of a production system is widely encountered both in the literature and in practice. Simulation is a very useful method to identify the necessary number of resources. However, if there are numerous resources, it can become impossible to make a sound 'trial-and-error' analysis with simulation models, so that strategies using simulation optimization appear as an attractive approach. Unfortunately, it is necessary to specify a cost function, and, in practice, it is often very difficult to formalize such a function which is used to determine the number of resources that will minimize this cost. We propose a different modeling approach, which aims at sizing the resources so as to meet the design specifications. In this respect, we search for the minimum number of resources of each type, while satisfying the performance requirements specified in the design project. As a result, the problem is formulated as a stochastic multi-objective optimization problem with constraints. The approach used here is based on simulation, used in conjunction with a bootstrap approach which accounts for the stochastic aspect of the model, and with regression metamodelling in order to derive an analytical formulation of the constraints together. Different multi-objective optimization methods can then be used to solve the problem. An illustrative example will be provided.

Biography:  Orhan Feyzioğlu earned B.S. degree in Industrial Engineering from İstanbul Technical University in 1996, M.S. and PhD degrees in Industrial Engineering from Boğaziçi University in 1998 and 2003, respectively.  He was a postdoctoral researcher at Laboratoire d’Informatique, de Modélisation et d’Optimisation des Systèmes (LIMOS – UMR CNRS 6158), France, from 2003 to 2004. He is currently assistant professor at Industrial Engineering Department in Galatasaray University. His research interests are analysis, modeling and design of manufacturing and logistics systems.

June 7, 2006, 13:40, FENS 2019