Propuesta de mejora de control de inventarios mediante la comparativa de metodologias Kanban y DDMRP en el Centro Grafico Salesiano

Abstract

This article presented a proposal to improve inventory control by comparing two methodologies: Kanban and Demand Driven Material Requirements Planning (DDMRP) in the warehouse of the Salesian Graphic Centre. A model of the raw material warehouse was developed using DDMRP, establishing decoupling points and determining profiles and buffer levels to optimise the inventory. For Kanban, the necessary cards were defined. A model of the real system was simulated in Flexsim over a 3-month horizon. The simulation in flexsim provided a key value: the total outputs of each item. This data, together with the average inventory obtained from the manual simulation in Excel, was used for the generation of replicates, allowing the calculation of the inventory turnover rates of both methods. By means of hypothesis tests, these indicators were compared to determine which of the two models offered a better inventory turnover, considering the availability of materials and stock reduction.