Inventory Research Of The Supply Chain In Steel And Iron Industry

As a pillar industry, iron and steel industry has made a significant contribution to China's economic development. Steel and iron inventory is a hot research issue in the supply chain management. How to make use of advanced management methods and mathematical models to obtain reasonable inventory to meet customer service and reduce unnecessary inventory-related costs, and accelerate corporate capital turnover rate, is the goal that the enterprises should pursue in the future. The main research task is to minimize inventory costs to the largest extent by optimizing the inventory management and logistics balance of iron and steel industry. The specific research content includes:(1)It does research and analysis to the status both at home and abroad and problems existed in the supply chain inventory of iron and steel enterprise, predicts direction of development in the future, and points out the research clues of the paper;(2)It does analysis to the material inventory of iron and steel under the influence of the uncertain factors, establishes minimum model of raw materials inventory cost in the iron and steel enterprises in the integrated consideration of raw materials balance, production and sales balance of products, procurement, inventory capacity matching, the total supply capacity and many constraints conditions. By making each purchase amount and raw materials inventory as the decision-making variables, adopting the genetic algorithm, and using MATLAB to get the optimal solution, it does optimization to the procurement and raw materials inventory;(3)It does analysis to the formation reasons of the slab inventory, in order to ensure matching production of the continuous casting and rolling for the downstream and upstream output, we study a reasonable slab inventory, produce a basic inventory as per the output gap of continuous casting machine and rolling machine, exists a flow inventory according to the repair and fault status of continuous casting machine and rolling machine. By statistical analysis and theoretical calculations, it finally gets reasonable slab inventories and establishes slab inventory management system;(4)According to the batch production of iron and steel enterprises, and in consideration of inventory-related costs, including fixed costs, storage costs, shortage costs (including deferred delivery costs and lost sales costs), establish the model of finished products inventory cost. When calculate model, we make c + + program and do accurate calculation to the model, optimize the production cycle, production time and production quantities, and define the deferred delivery coefficients. By changing the value of the deferred coefficient, analyze the influence to the production cycle, production time and production quantities and all kinds of costs. (5)On the basis of the measured data in Shui Steel, this paper analyses capacity matching of steelmaking - CC– rolling, by the processes time and the production studies, determine the "bottleneck" of the production processes and propose improvement measures. Through load rate and logistics balancing coefficients, it analyses the balance of the production logistics and make certain adjustment to the output of the products to reach the balance of production capacity of the processes and the production logistics.