O problema do tunel de congelamento

AUTOR(ES)

João Eduardo Cardoso Scheidt

DATA DE PUBLICAÇÃO

1996

RESUMO

Freezing tunnels are food industry facilities for conditioning of meat, ice-cream, milk, yogurt, etc. They are very unwished botlenecks because they are positioned at the end of the production process of highly perishable items (low in-process inventory). The freezing tunnel loading problem is that of maximizing its production in terms of the amount of frozen trays of products. The purpose of this study is to model this problem and develop methods for solving its static and dynamic versions. In the static problem, the arrival time and the conditioning time of each tray are known in advance for the entire loading period. One should then completely schedule the loading of the tunnel. Each tray must be assigned to a position in the tunnel or be rejected. . We discuss several approaches and show some theoretical results for relaxed problems. In the dynamic problem, the arrival and the demand of trays are not known in advance. In this case, the decisions must take place at the arrival times. Several policies are developed. Some real case based scenarios are used for testing the policies. The study shows the potential gains with the application of some policies, mainly those ofthe class we named chain policies

ASSUNTO(S)

animação por computador heuristica metodos de simulação

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