Postergação de tempo no projeto de rede logística reversa do óleo de cozinha em Vitória - ES
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Data
2017-03-27
Autores
Servare Junior, Marcos Wagner Jesus
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Universidade Federal do Espírito Santo
Resumo
A crucial issue in the design of efficient logistics systems is the identification of locations for inventory facilities and the literature includes several models for this type of problem, such as the proposal promoted by the time postponement, which encourages the creation and centralization of inventories to minimize costs and risks associated with planning a supply chain. Furthermore, the world growth of the consumption of products causes the emergence of a paradigm related to the end of the useful life or the end of the consumption of these products. This issue becomes more important as it can cause damage and environmental problems. The disposal of used cooking oil is one of these situations, which when improperly discarded could cause a severe environmental impact in an area. Along with the increase in the consumption of cooking oil, laws were promulgated, among them the National Solid Waste Policy, with the objective of encouraging the return in the reverse chain and, thus, motivated the growth of the research field of reverse logistics for environmental issues and the promotion of new installations and flows for this system. In this thesis, the problem of time postponement is analyzed. As an application, the study of time postponement in the reverse cooking oil chain in the city of Vitória in the State of Espírito Santo was carried out. In this context, this work proposes a mathematical modeling for the use of time postponement in the design of the reverse supply chain. The model was applied to the case study area from the definition of 24 scenarios and then solved with the implementation in CPLEX 12.6 that was able to solve all these scenarios to the optimallity. With the results achieved, proposals were prepared considering the current scenario with a long-term projection and another proposal considering the same scenario with the increase of capacity to a waste processing company in the area. Also, the importance of transport costs in the formation of the total cost was detected, besides indicating a forecast of expenses with the implementation of the scenarios and alternatives for the implementation of the project.
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Palavras-chave
Time postponement , Reverse logistics , Supply chain design , Math modelling , Used cooking oil , Postergação de tempo , Logística reversa , Projeto da cadeia de suprimentos , Modelagem matemática , Óleo de cozinha usado
Citação
SERVARE JUNIOR, Marcos Wagner Jesus. Postergação de tempo no projeto de rede logística reversa do óleo de cozinha em Vitória - ES. 2017. Dissertação (Mestrado em Engenharia Civil) - Universidade Federal do Espírito Santo, Centro Tecnológico, Vitória, 2017.