Estudo da estrategia de busca orientada por restrições em plantas multiproposito operando em batelada

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

The problem considered is short term scheduling of batch chemical plants. Constraints over plant capacity are taken as well as intermediate storage constraints since they are frequent in the process industries area. The proposed approach utilizes a constraint based search technique based on bottlenecks identification to guide the search procedure and reduce the search space. To reach this goal, the usual constraint propagation techniques over unitary resources are implemented, and it is proposed a new intermediate storage constraints propagation technique. New bottlenecks identification and measurement strategies are proposed to have a more efficient search procedure. The search procedure identifies the hardest constraints, and takes decisions that keep the greater flexibility for the remaining variables. The results show a big efficiency gain in the search procedure by reaching a complete solution with less visited nodes in the search tree, as well as visiting fewer infeasible nodes. The result is a reduction of computational time and resources

ASSUNTO(S)

just-in-time processos quimicos engenharia de produção agenda de execução (administração)

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