Browsing by Subject "Cellular Manufacturing Systems"

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Open Access
Dynamic lot-sizing and scheduling in a cellular manufacturing system
(1993) Dağlıoğlugil, Orhan
In most of the production systems, lot-sizing and scheduling decisions are given in different levels of hierarchy, however there is a strong interaction between these decisions. Most of the existing models do not utilize the shop floor conditions in lot-sizing and scheduling decision dynamically, even though such a. decision might improve the system performance. In tins study, a dynamic lot-sizing and scheduling algorithm is suggested for cellular manufacturing systems, wliich utilizes a h}d)rid simulation/analytic modelling approach. The performance of the proposed algorithm is compared with the push and pull systems under different shop floor conditions.
Open Access
Part family machine group formation problem in cellular manufacturing systems
(1989) Kandiller, Levent
The first and the most important stage in the design of Cellular Manufacturing (CM) systems is the Part Family Machine Group Formation (PF/MGF) problem. In this thesis, different approaches to the PF/MG-F problem are discussed. Initially, the design process of CM systems is overviewed. Heuristic techniques developed for the PF/MG-F problem are classified in a general framework. The PF/MG-F problem is defined and some efficiency indices designed to evaluate the PF/MG-F techniques are presented. One of the efficiency indices evaluates the inter-cell flows and inner-cell densities while another one measures the within-cell work-load balances. Another index measures the under-utilization levels of machines. A number of the most promising PF/MG-F techniques are selected for detailed analysis. These selected techniques are evaluated and compared in terms of the efficiency measures by employing randomly generated test problems. Finally, further research areas are addressed.