Análise comparativa entre modelos de estoque
Inventory models comparative analysis
Santoro, Miguel Cezar; Freire, Gilberto
http://dx.doi.org/10.1590/S0103-65132008000100007
Prod, vol.18, n1, p.89-98, 2008
Resumo
Este trabalho é um estudo do problema de escolha entre modelos de estoque para a gestão de itens independentes em local único. Quatro modelos de estoque são considerados, sendo três deles reativos, que não utilizam previsão de demanda para a tomada de decisões, e um ativo, que decide com base em previsões. A medida de desempenho considerada é o custo de operação médio por período, que é obtida através de simulação da utilização dos modelos com base num histórico de vendas. O trabalho analisa o efeito da alteração de previsibilidade e da consideração de quantidades mínimas de compra no modelo ativo no desempenho relativo dos modelos analisados. A análise utiliza um modelo de busca acoplado a um simulador. O trabalho apresenta subsídios para a escolha e parametrização de modelos de estoque em empresas.
Palavras-chave
Modelos de estoques, simulação, busca
Abstract
This paper is an approach of the inventory models selection problem in single echelon system management with independent items. Four inventory models are considered, three reactive, which don't use demand forecasting for decision making, and one active model, that decides based on forecasting. Average operation cost per period is the performance measurement variable considered, calculated by using simulation of the models applied on sales temporal series. The paper analyses the effects, in the relative models performance, of the demand forecast accuracy and the use of minimum acquisition quantity in the active model. The analysis uses a search model jointly a simulator to optimize the parameters. The results present useful information for models selection and parameters determination in organizations environment.
Keywords
Iinventory models, simulation, search
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