Dynamic Simulation of the Supply Chain with VMI Policy

摘要

Based on the traditional vendor managed inventory (VMI) policy,the third-party logistics (TPL) is introduced to the supply chain.A dynamic simulation model is established by using system dynamics for the supply chain with VMI policy.By analyzing the key parameters,the influences of system stability and the average total inventory of the supply chain with VMI policy caused by order time,transporting time and expected inventory are studied.Reducing the order time T1 can help the supply chain with VMI policy to be more stable and reduce the average inventory of whole system.When the other variables keep constant,on the condition of T1d,the increasing of T2 will push the system from stable to unstable.When the other variables keep constant,reducing the expected inventory EI can reduce the average inventory of the system.No matter the expected inventory EI is,after some days the curve of total inventory will become stable at last.These conclusion will help companies to operate the supply chain with VMI policy better.