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APPLICATION OF LOCAL SEARCH METHODS FOR SOLVING A QUADRATIC ASSIGNMENT PROBLEM: A CASE STUDY G rdal Ertek, Burak Aksu,

2. Introduction. Application of local search methods Real-life application at a steel cord manufacturing plantLayout problem that can be represented as a Quadratic Assignment Problem (QAP) Implement the well-known local search methods, 2-opt, 3-opt and tabu search. Compare to solution of NEOS. 3

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APPLICATION OF LOCAL SEARCH METHODS FOR SOLVING A QUADRATIC ASSIGNMENT PROBLEM: A CASE STUDY G rdal Ertek, Burak Aksu,

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    1. 1 APPLICATION OF LOCAL SEARCH METHODS FOR SOLVING A QUADRATIC ASSIGNMENT PROBLEM: A CASE STUDY Gürdal Ertek, Burak Aksu, S. Ilker Birbil, Murat Cihan Ikikat, Can Yildirmaz Sabanci University Orhanli, Tuzla 34956 Istanbul, Turkey

    2. 2 Introduction Application of local search methods Real-life application at a steel cord manufacturing plant Layout problem that can be represented as a Quadratic Assignment Problem (QAP) Implement the well-known local search methods, 2-opt, 3-opt and tabu search. Compare to solution of NEOS

    3. 3 Steel Cord Typically used as the main reinforcement material in manufacturing steel radial tires. Strengthens the tire to provide fuel savings, long mileage, safety and comfort. Continuous processes, where wire semi-products are stored on discrete inventory units, namely “spools”

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    5. 5 Literature on Steel Cord Manufacturing Very specialized type of manufacturing. Systems required are produced and installed by only a handful of companies in the world.

    6. 6 Literature on Steel Cord Manufacturing Thomas et al. (2002): Improvement of operations in a steel cord manufacturing company using simulation Mercankaya (2003): Development of an optimization-based decision support system Türkseven and Ertek (2003): Determination of optimal spool lengths under certain constraints.

    7. 7 Steel Cord Manufacturing Processes Incoming raw material, the “steel rod wire”, is thinned by dry and wet drawing into “filaments” that are used in successive bunching operations to construct the “steel cord” final products. The first phase of the production is carried out by machines that are fixed to their locations. The focus of our research is the second phase of production, which starts with wet wire drawing and ends with spiraling.

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