Avaliação do desempenho logístico do transporte rodoviário de madeira utilizando Rede de Petri / Evaluation of performance logistic of the road transport of wood with Petri Net

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The present research aimed to evaluate the logistic performance model of productive chains (ADELCAP) based on the duration of the elements of the operational cycle of the wood transport. This can optimize resources to guarantee a continuous flow of transport and to assure an appropriate volume of wood arriving into the factory. This case study was based on a cellulose producer of the State of Minas Gerais, Brazil. Diagnose of the logistic chain of wood supply of this company was initially made to identify possible bottle necks along the chain. The key variables were defined based on the characterization of the structure and operation tools and the main directions that affect the efficiency and competitiveness were identified and evaluated. The Temporary Petri Nets was the model of the logistic of wood transported because it works with two periods that correspond to the duration of sensibilazation. Their properties are: simulation (working with hypothetical sceneries), dynamic (where the exit depend on the initial values); deterministic (the exit variables are not random); continuous (the time is measured with real numbers) and; temporal in the transitions. The sceneries were produced with the same variations of the two regional wood producing areas studied and their simulations were done with the software JARP and ARP to evaluate the operational and economical performance. The variations applied in the sceneries were: the improvement of forest highways; increasing the numbers of loaders and; improvement of the efficiency of the garage. The scenery with the three variations (scenery 7) presented the biggest reduction of the duration of the cycles of wood transport for both regional ones compared to the current situation with 19.24% and 21.48%, respectively for the Rio Doce and Cocais das Estrelas regions in the Minas Gerais State, Brazil. The operational cost analyzed was the value paid for the freight without including the investment costs. This showed a bigger reduction with the Scenery 7 with 20.09% and 21.22%, respectively, for the regional of Rio Doce and Cocais das Estrelas.

ASSUNTO(S)

transporte florestal manejo florestal setor florestal wood transport logistic and petri nets forestry sector logística e rede de petri

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