Gestão & Produção
https://www.gestaoeproducao.com/article/doi/10.1590/0104-530X1882-16
Gestão & Produção
Article

Abordagens de otimização para a programação e sequenciamento das frentes de colheita de cana-de-açúcar

Optimization approaches for sugarcane harvest front programming and scheduling

Rogério de Ávila Ribeiro Junqueira; Reinaldo Morabito

http://dx.doi.org/10.1590/0104-530X1882-16 Gest. Prod., vol.24, n2, p.407-422, 2017
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Resumo

Resumo: A produção de açúcar, álcool e energia elétrica a partir de cana-de-açúcar passa necessariamente pela colheita e transporte da matéria-prima, que são operações custosas, complexas e que interferem na eficiência industrial. Neste estudo, propõe-se abordagens de otimização para apoiar decisões de programação e sequenciamento das frentes de colheita inspiradas na representação do problema por meio de um modelo de dimensionamento e sequenciamento de lotes da produção em máquinas paralelas, com custos e tempos de setup dependentes da sequência, muito estudados na literatura. Para verificar a adequação e coerência dessa representação foram desenvolvidos vários experimentos com dados realistas. Os resultados obtidos mostram que as abordagens propostas representam apropriadamente o modelo conceitual estudado e têm grande potencial para redução de custos na prática.

Palavras-chave

Planejamento de colheita de cana-de-açúcar, Programação e sequenciamento de frentes de colheita, Dimensionamento e sequenciamento de lotes de produção, Programação inteira mista

Abstract

Abstract: The production of sugar, ethanol, and electricity from sugarcane necessarily involves harvesting and transportation of raw materials, which are expensive and complex operations that affect industrial efficiency. The present study proposes optimization approaches to support programming and scheduling harvest front decisions, based on considering the representation of the lot sizing and scheduling problem on parallel machines with sequence-dependent setup times and costs, a modeling technique widely reported in the literature. We carried out real data experiments in order to verify the adequacy and consistency of this representation. The results show that the proposed approaches adequately represent the conceptual model studied and have great potential to reduce cost in real-life situations.

Keywords

Sugarcane harvesting planning, Programming and scheduling of harvest fronts, Lot sizing and scheduling, Mixed integer programming

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