Modelagem de redes logísticas com custos de inventário calculados a partir da cobertura de estoque
Logistic networks modeling with inventory carrying costs calculated using inventory turnover
Hamad, Ricardo; Gualda, Nicolau Dionísio F.
http://dx.doi.org/10.1590/S0103-65132011005000011
Prod, vol.21, n4, p.667-675, 2011
Resumo
A consideração dos custos de inventário tem se tornado cada vez mais importante na análise dos trade-offs e na tomada de decisões sobre redes logísticas. O artigo propõe uma metodologia para tratamento do custo de inventário a partir da cobertura de estoque esperada em cada instalação, incorporada na modelagem matemática da localização de fábricas e/ou centros de distribuição em redes logísticas com vários elos, representando uma nova versão do modelo apresentado em Hamad e Gualda (2008). As principais contribuições desta metodologia em relação a outros métodos encontrados na literatura são a facilidade de aplicação do método, a inclusão de restrições ligadas à capacidade de armazenagem e a consideração do custo total de inventário, e não apenas do custo relacionado aos produtos modelados.
Palavras-chave
Otimização de redes logísticas. Configuração de redes logísticas. Giro de inventário. Custos de inventário.
Abstract
Inventory carrying cost has become very important in the analysis of the trade-offs and an important component to be considered when taking decisions about a logistic network. This paper proposes a methodology incorporated in a multi-echelon sourcing decision model, to be considered as a new version of the model presented in Hamad, Gualda (2008). It treats the carrying costs using the inventory Days-on-hand estimate in each echelon of the chain (plants and/or Distribution Centers). The main contributions of this methodology compared to other options found in the literature are the simplicity of its application, the consideration of all inventory costs (not only the ones related to the products being modeled) and, also, the inclusion of constraints related to warehousing capacity.
Keywords
Logistic networks optimization. Logistics network design. Inventory turnover. Inventory carrying costs.
References
ARNTZEN, B. C. et al. Global Supply chain management at Digital Equipment Corporation. Interfaces, v. 25, n. 1, p. 69-93, 1995.
ARROW, K. A.; KARLIN, S.; SCARF, H. E. Studies in the Mathematical Theory of Inventory and Production. Stanford, CA, USA: Stanford University Press, 1958.
BALLOU, R. H. Business Logistics Management. 4 ed. Englewood Cliffs, NJ: Prentice-Hall, 1998.
BHUTTA, K. S. et al. An Integration Location, Production, Distribution and Investment Model for a Multinational Corporation. International Journal of Production Economics, v. 86, p. 201-216, 2003.
BHUTTA, K. S. Global Supply Chains: An Integration Location, Production, Distribution and Investment Model for a Multinational Corporation Operating Under Varying Exchange Rates and Tariff Structures. Dissertation (Doctoral)-University of Texas, Arlington, 2001.
BHUTTA, K. S. International facility location decisions: a review of the modelling literature. International Journal of Integrated Supply Management, v. 1, n. 1, p. 33-50, 2004.
BRITO JUNIOR, I. Análise do impacto logístico de diferentes regimes aduaneiros no abastecimento de itens aeronáuticos empregando modelo de transbordo multiproduto com custos fixos. Dissertação (Mestrado)-Escola Politécnica, Universidade de São Paulo, São Paulo, 2004.
CHRISTOPHER, M. Logística e Gerenciamento da Cadeia de Suprimentos - Estratégias para a redução de custos e melhoria dos serviços. São Paulo: Ed. Pioneira, 2002.
CLARK, A. J. A dynamic, single-item/multi-echelon inventory model. Santa Monica, California: The Rand Corporation, 1958. RM2297.
CRANDALL, R. E.; CRANDALL, W. R. Managing Excess Inventories: a life-cycle approach. Academy of Management Executive, v. 17, n. 3, 2003.
DOGAN, K.; GOETSCHALCKX, M. A primal decomposition method for the integrated design of multi-period production-distribution system. Research report. IIE Transactions, v. 31, n. 11, p. 1027-1036, 1999.
EFROYMSON, M. A.; RAY, T. L. A branch and bound algorithm for plant location. Operations Research, v. 14, p. 361-368, 1966.
EPPEN, G. D. Effects of centralization on the expected cost in a multi-location Newsboy Problem. Management Science, v. 25, p. 498-501, 1979.
FINANCIAL EDUCATION. Inventory Turnover and Days Inventory-On-Hand. 2007. Disponível em:
FLIPO, C. D. Spatial decomposition for a multi-facility production and distribution problem. International Journal of Production Economics, v. 64, p. 177-186, 2000.
FLIPO, C. D.; FINKE, G. An integrated model for an industrial production-distribution problem. IIE Transactions, v. 33, n. 9, p. 705-716, 2001.
GARCIA, E. S. et al. Gestão de estoques: otimizando a logística e a cadeia de suprimentos. Rio de Janeiro: E-papers Servicos Editoriais Ltda., 2006. Disponível em:
GEOFFRION, A. M.; POWERS, R. F. Twenty years of strategic distribution system design: an evolutionary perspective. Interfaces, v. 25, n. 5, p. 105-127, 1995.
GOETSCHALCKX, M.; VIDAL, C. J.; DOGAN, K. Modeling and design of global logistics systems: A review of integrated strategic and tactical models and design algorithms. European Journal of Operational Research, v. 143, p. 1-18, 2002.
GROSS, D.; PINKUS, C. E.; SOLAND, R. M. Designing a multi-product/multi-echelon inventory system. In L.B. Schwartz, "Multi-commodity facilities location problem". Journal of the Operational Research Society, v. 32, p. 803-814, 1981.
HADJINICOLA, G. C.; KUMAR, K. R. Modeling manufacturing and marketing options in international operations. International Journal of Production Economics, v. 75, p. 287-304, 2002.
HAMAD, R.; GUALDA, N. D. F. Modelo para localização de instalações em escala global envolvendo quatro elos da cadeia logística. Transporte e Transformação, v. 10, p. 59-73, 2006.
HAMAD, R.; GUALDA, N. D. F. Models for Facilities or Vendors Location in a Global Scale Considering Several Echelons in the Chain. Networks and Spatial Economics, v. 8, p. 297-307, 2008.
HARRIS, F. W. How many parts to make at once. Factory, The Magazine of Management, v. 10, n. 2, p. 135-136, 1913.
KUEHN, A. A.; HAMBURGER, M. J. A heuristic program for locating warehouses. Management Science, v. 9, p. 643-666, 1963.
MOHAMED, Z. An integrated production-distribution model for a multinational company operating under varying exchange rates. International Journal of Production Economics, v. 58, p. 81-92, 1999.
NAHMIAS, S. Single-Product, Single-Location Models. In: GRAVES, S. C. et al. Handbooks in OR & MS. 1993. chap. 1, p. 3-55.
NOZICK, L. K.; TURNQUIST, M. A. Inventory Transportation, Service Quality and the Location of Distribution Centers. European Journal of Operations Research, v. 129, p. 362-371, 2001.
OWEN, S. H.; DASKIN, M. S. Strategic facility location: A review. European Journal of Operational Research, v. 111, p. 423-447, 1998.
REVELLE, C. S.; EISELT, H. A. Location analysis: A synthesis and survey - Invited review. European Journal Of Operational Research, v. 165, p. 1-19, 2005.
SHAPIRO, J. F. Modeling the Supply Chain. Pacific Grove CA: Duxbury Press, 2001.
SMITS, S. R. Evaluation model for the design of Distribution Networks. The Netherlands: Faculty of Technology Management, 2001.
SPIELBERG, K. Algorithms for the simple plant-location problem with some side constraints. Operations Research, v. 17, p. 85-111, 1969.
STANDAGE, T. An edible history of humanity. Walker & Company, 2009. 288 p.
SYAM, S. S. A model and methodologies for the location problem with logistical components. Computers and Operations Research, v. 29, p. 1173-1193, 2002.
VALLIM FILHO, A. R. A. Localização de Centros de Transporte e Carga - Uma contribuição para Modelos de Otimização. Tese (Doutorado)-Escola Politécnica, Universidade de São Paulo, São Paulo, 2004.
WILSON, R. H. A Scientific Routine for Stock Control. Harvard Business Review, v. 13, p. 116-128, 1934.
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