Modelo de decisão para a programação de entrega de concreto produzido em centrais. / A decision model for the problem of scheduling concrete delivery produced in concrete batch plants.
AUTOR(ES)
Clicia Soriano Côrtes
FONTE
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia
DATA DE PUBLICAÇÃO
23/05/2011
RESUMO
This paper addresses the problem of scheduling concrete delivery produced in concrete batch plants. Such scheduling comprises the decisions of which center should serve each customer and what time each delivery vehicle should be loaded, so as to maximize the total marginal revenue of the system. Vehicle loading capacity constraints per center, fleet availability and the assurance that all orders will be fulfilled by a single concrete center are considered. In order to solve this problem efficiently, we propose a mathematical programming model based on a time-space network, implemented in a spreadsheet environment, as part of a decision support system. The system features a user-friendly interface, developed in VBA, which makes it easy to enter data and understand the results provided, even by those without knowledge in operational research. The implementation of the proposed model to solve problems with real data confirms that the model works properly, taking into consideration the constraints and quickly generating the optimal solution. Thus, the developed tool appears to be very useful for scheduling operations of a company which operates several concrete batch plants.
ASSUNTO(S)
concreto dosado na central delivery scheduling programação de entrega ready mixed concrete rede espaço-tempo space-time network
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