Análisis del efecto de diferentes sistemas de control de inventarios en una cadena de abastecimiento utilizando simulación

Abstract

This research work presents a simulation model to analyze the effect of different inventory control systems used in two levels of a supply chain. The parameters or operation conditions of the model are based on a theorist or hypothetical general case; the general inventory models determined other parameters necessaries in the model for the desired analysis, this analysis is considering the effect in the total relevant cost and the service level, and was studied in each echelon and in the two levels; in this supply chain the supplier delivers an X product to three retailers. Through the computer simulation and the respective analysis, the study found out that sometimes some echelons have to give up the control system that produces less cost, without using it, but this is the way that everyone finds benefit as a group. For the analysis different scenarios were designed, where the control systems s,Q, R,S and s,S are combined in many ways in the four echelons of the supply chain, finding that, with the operation conditions, the best scenario for the supply chain is present when the retailers 1 and 2 work with the continue control system s,S, the retailer 3 with s,Q, and the supplier with the control system s,Q, these systems can affect the decision variables analyzed if any of them changes. The orders and the lead time, generated through random numbers with normal distribution, have an influence in the inventory levels and the system behavior.