Browsing by Author "Şahin, Özge"

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    An adaptive kanban control mechanism sensitive to changes in inventory
    (Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2013-06) Şahin, Özge; Selçuk, Barış
    There are a number of alternative production control approaches in literature. Most of them are adequate in theory but they are not applicable for a real life manufacturing environment. Uncertain demand and unbalanced production times are two important problems in a manufacturing environment. These two parameters affects the work-in-process and finished goods inventory level of the manufacturing system which leads to an increase in the total cost of manufacturing system. Therefore we utilized from a kanban operated Just-in-Time system and tried to adapt this concept into real life problems. We called our proposed system as an adaptive kanban control system. Our approach to developing an adaptive kanban system is different from the available techniques in the literature such that we explicitly incorporate the concept of update frequency. The number of kanban cards are updated (increased / decreased) according to the inventory status of the system. The new adaptive kanban control system is examined in two types. One of them includes a constant production time parameter. At the other one includes the production time parameter varies according to the work-in-process inventory status of the system. Our systems are modeled by continuous-time Markov chain and solved obviously. We specify our numerical results explicitly. Eventually, it is shown that our adaptive kanban system is superior to the traditional static kanban system under a prescribed set of conditions.