Research On Optimization Of A Company's Spare Parts Inventory Management Based On Lean Six Sigma

The global integrated circuit technology has achieved unprecedented rapid development since the 20 th century,Not only has the size of the integrated circuit become smaller and smaller,but the capacity per unit has been multiplied and the operating speed has been greatly improved.As the basic hardware for modern information products and the carrier for various types of software,the integrated circuits are widely used in all aspects of life and play an important role.The rapid development of integrated circuits is absolutely inseparable from the assistance of the tool of electronic design automation(Abbreviation: EDA),and EDA manufacturers are also taking multiple measures to improve their aftersales service.Among these measures,the response speed of delivering spare for maintenance is closely related to the quality of after-sale service.However,the uncertainty demand on spares and the complicated management of lead times makes inventory management much difficult than other types of inventory,so it is particularly challenge to optimize spare parts inventory management.EDA manufacturers are intelligence-intensive enterprises,and they pay more attention on the research and development and promotion of product technology while the manufacturing and delivery are handled to the cooperated foundry,so they have no experience in inventory management,and lack of relevant knowledge and experience.The innovation of this research is to apply lean management and Six Sigma process to the spare inventory management for intelligence-intensive enterprises,which not only saves corporate funds,but also improves customer satisfaction through the efficient supply and timely maintenance,wins customer recognition,enhance the competitiveness of enterprises and affect the sales rate of products indirectly.In this study,Company A is an EDA manufacturer,and the company's spare parts inventory management is the research object.First,the PEST and SWOT models are used to analyze its external environment and market competitiveness,and then concluded that Company A can better serve the small and medium integrated circuit companies in China by enhancing its differentiated competition,like improving the management of its spares inventory in China to improve after-sale maintenance service.Company A identified the existing problems under the current situation of spare parts inventory management through the collective interview method,and then introduced the Lean Six Sigma theory to recognize the root cause on inefficient management and the value-added and non-valueadded activities in the process,carried out a quantitative analysis with SPSS software,and followed the DMAIC process "define-measure-analyze-improve-control" to make complex problems breaking down and resolved one by one,which improves spares control and enhances communicating channels,optimizes classification management,improves warehousing and logistics capabilities,and ultimately facilitate the respond on maintenance,decrease the inventory,improve the turnover on inventory,which saves the big cost on spares inventory.