Diseño de políticas de inventario para una institución pública utilizando modelos de simulación

Abstract

In supply chain management, it is essential to develop inventory policies capable of meeting highly volatile demands while keeping the required investment in inventory to a minimum. This research aims to compare different inventory management systems and select the most convenient for a public institution warehouse. Consideration is given to products with highly volatile demands and government restrictions in public procurement processes. Three different inventory policy options based on buffers and target inventory are proposed with different methods for calculating the order quantity. The three options are simulated using Flexsim and compared with the current system’s results. The best option is determined using the indicators of average inventory, inventory days, and stockout. It is determined that the three options perform better than the current situation. However, the best option is third one, which asks for the maximum value between the difference between the target inventory and the current inventory and the sum of the three previous consumptions. Additionally, a sensitivity analysis was performed considering an increase in the variability of the demand and lead-time, with which the response of these models to the new proposed scenarios could be evidenced.