Research on Overall Improvement of Production Efficiency: A Case Study Based on Value Stream Mapping Analysis in Automobile Decoration Products Manufacturing Industry

This article is a practical study focusing on three lean manufacturing techniques, which are value stream mapping (VSM), Kanban information system, and layout optimization of production line in Automobile decoration products manufacturing industry. Value stream mapping (VSM) is applied to focus more on the streams in the production processes, while Kanban is implemented as the main subject for just-in-time (JIT) production systems. Taken S Company F production line as an example, the application of the lean manufacturing techniques to solve the problems of F production line, such as low line balance rate, long handling route, lack of personnel utilization and unobstructed logistics and information flow, is applied to optimize its production line. As a result, the delivery time of the F production line is reduced from the original 40.24 days to 15.57 days, handling distances of the process shortened from 352.2 meters to 189 meters, the number of WIPs decreased from 166,000 to 8,300, the daily production capacity of 888 products increased from 152 to 334. It proves that using value flowchart to optimize production process is the significance of this essay.