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    Öğe
    A hybrit approach on single server parallel machines scheduling problem with sequence dependent setup times
    (Gazi Univ, Fac Engineering Architecture, 2011) Türker, A. Kürşad; Sel, Cagri
    In this paper, a scheduling problem on two identical parallel machines with sequence-dependent setup times and setup operations that performed by a single server is considered. The main objective is to minimize the makespan of the schedule. For solution procedure, an algorithm combining genetic algorithm and tabu search methodology is proposed. Firstly, the algorithm finds an initial solution using genetic algorithm module. Then, tabu search module is applied to the solution of genetic algorithm in order to find better solution. The performance of the algorithm is analyzed by comparing the results with the random search results. It has been seen that the proposed algorithm is effective to solve P2,S vertical bar STsd vertical bar Cmax scheduling problem in reasonable time, and the results are close to optimum solution values.
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    Öğe
    Integrated definition modeling and Taguchi analysis of flexible manufacturing systems: aircraft industry application
    (Springer London Ltd, 2013) Pinarbasi, Mehmet; Sel, Cagri; Alagas, Haci Mehmet; Yuzukirmizi, Mustafa
    In this paper, flexible manufacturing systems (FMS) are studied. Firstly, an FMS design approach is proposed using integrated definition for function methodology. A systematic layout design and performance evaluation scheme is presented and detailed using this modeling framework. Then, the proposed approach is carried out with a case study from an aircraft industry to convert an existing traditional production system to FMS. To improve the system performance, a simulation-based method with Taguchi approach consisting of multiproducts is utilized. The objective is to find the machine and the product mix that achieves the maximum utilization while minimizing the cycle time. FMS system performance has been greatly improved by determining the most advantageous level of system components. It has also shown that FMS is a practicable production system in aircraft industry.