Optimization For Order Mode Of Maintenance Spare Parts In Company D Based On Stock Age Analysis

Nowadays,joint-venture automobile manufacturing enterprises in China are generally affected by the decline of sales profit.They are faced with huge cost optimization challenges,so they need to improve the profit level through a variety of measures.Among them all,the maintenance spare parts inventory has been paid more and more attention by the managers because of the large occupancy rate of inventory funds and low turnover rate.Due to the poor management foundation and the lack of professional theoretical support,the optimization of maintenance spare parts inventory,especially the optimization of ordering mode,can not keep up with the pace of the overall cost optimization of the enterprise.The maintenance spare parts are affected by many factors such as the running time of the equipment in workshop,the maintenance situation of the equipment,the environment of the spare parts in production,the frequency of the sudden device fault,etc.In the current ordering mode of maintenance spare parts of company D,the management of key factors such as ordering time,quantity,high and low reserves depends more on the experience of equipment maintainers,although there is no systematic theoretical model for spare parts management,which leads to the increase of maintenance spare parts inventory amount,and a large number of spare parts can not be consumed in time,resulting in overstock.In this paper,taking the order mode of maintenance spare parts of D company as the optimization object,referring to the research results and theoretical knowledge in the fields of inventory analysis,spare parts demand prediction and order strategy at home and abroad,combining the inventory data of engine and gearbox workshop,using the inventory management module of SAP software.Based on the analysis of inventory amount,inventory structure and main inventory indexes,this paper sums up the main problems such as high proportion of spare parts with more than three years of ex warehouse age,low turnover rate of new spare parts and repeated ordering of spare parts.In view of the main problems,through the improved ABC classification method,the continuous spare parts demand prediction method and the economic batch model of setting up safety stock,the first step is to scientifically classify the spare parts inventory and identify the key spare parts types;then the key spare parts demand is predicted to obtain the theoretical value of the annual demand;finally,the key spare parts ordering model is built and the ordering process is revised.By comparing and analyzing the optimization results,the goal of reducing order cost and total inventory by 10% is achieved.