PARALEL İŞLEMCİLİ ESNEK AKIŞ ATÖLYESİ ÇİZELGELEME PROBLEMLERİ İÇİN STOKASTİK ÇÖZÜM YAKLAŞIMI

Bu çalışmada sıra bağımlı hazırlık zamanlı k kademeli esnek akış atölyesi çizelgeleme problemi için önceden geliştirilmiş bir matematiksel model revize edilerek, sıra bağımlı hazırlık sürelerinin stokastik olma durumu incelenmiştir. Çalışmada bu anlamda üç matematiksel modele yer verilmektedir. M1 modeli söz konusu problem için daha önce geliştirilen matematiksel modeldir. M2 modeli, M1 modeline göre daha büyük problemleri, daha hızlı çözebilecek revize modeldir. M3 modeli ise M2’nin stokastik parametreleri dikkate alan halidir. Test problemlerinin çözülmesi sonucunda; M2 modelinin, çözebildiği problem boyutu ve çözüm süresi bakımından M1’e göre üstünlüğü, M3 modelinin ise stokastik parametreleri ele alarak tamamlanma zamanı bakımından daha iyi sonuçlar verdiği gösterilmiştir.

A STOCHASTIC SOLUTION APPROACH TO FLEXIBLE FLOWSHOP SCHEDULING PROBLEMS

In this study, a previously developed mathematical model for the k-stage flexible flow workshop scheduling problem with sequence-dependent setup time was revised and the stochasticity of sequence-dependent setup times was investigated. In this sense, three mathematical models are included in the study. The M1 model is the mathematical model previously developed for the problem in question. The M2 model is a revised model that can solve larger-size problems faster than the M1 model. The M3 model, on the other hand, is the version of M2 that takes stochastic parameters into account. As a result of solving test problems, it has been shown that the M2 model is superior to M1 in terms of the problem size and solution time it can solve, while the M3 model gives better results in terms of completion time by taking stochastic parameters.

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