Browsing by Author "Yılmaz, Görkem"
Now showing items 1-7 of 7
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Capacitated stochastic lot-sizing and production planning problem under demand uncertainty
Seyfishishavan, Seyed Amin; Yılmaz, Görkem; Yanıkoğlu, İhsan (Elsevier, 2022)This paper proposes two multi-period, multi-item capacitated stochastic lot-sizing problems under demand uncertainty. We model uncertainty via a scenario tree. The first model considers production, inventory, backlogging, ... -
Heuristic approaches for assembly line balancing and competent worker assignment problem (ALWABP)
Çengil, Muhammet Fatih (2018-01)In this study, we focus on assembly line balancing and worker assignment problem, where multiple production lines are executed by a shared pool of workers with varying skills and having absenteeism issues. We developed two ... -
A hierarchical approach for solving simultaneous lot sizing and scheduling problem with secondary resources
Şafak, C. U.; Yılmaz, Görkem; Albey, Erinç (Elsevier, 2019)This study represents a decomposition heuristic approach for simultaneous lot sizing and scheduling problem for multiple product, multiple parallel machines with secondary resources. The motivation of the study comes from ... -
Mathematical modeling and math heuristic approach for shift selection, lot sizing and worker assignment problem of Vestel
The simultaneous lot sizing and scheduling studies do not implement a worker assignment problem in the literature. This study provides a solution for worker assignment problems with overtime constraints of the Government. ... -
A multistage scenario optimization procedure for capacity planning in TV production final assembly lines
Vestel Electronics is a large-scale TV producer that has an important share in the European television market. High End Factory, where Vestel assembles 20 different TVs in size, consists of 14 final assembly lines. High ... -
Simultaneous lot sizing, scheduling workforce, overtime and shift planning MIP model including setup times and backlogging decisions
Şafak, Cevdet Utku (2017-12)Studies focusing on simultaneous lot sizing and scheduling problems, discard the effect of workforce constraints and tactical level decisions such as overtime and selected number of shifts. Generally, in production planning, ... -
A split delivery vehicle routing problem for daily tobacco delivery
One of the Turkey's largest cigarette manufacturer, located in Izmir, receives distributors' orders from all over Turkey every day. Processed and packed cigarettes are distributed to all distributors in different locations ...
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