Intelligent Integrated Method of EPC and SPC in Manufacturing Process Quality Control

Although the EPC method can properly control single parameter´s changes during the manufacturing process to meet quality requirements, however, in project practice, it has been proved that a single control parameter can not guarantee the best manufacturing quality. The manufacturing quality is also closely related with the distribution of the values of parameters. Therefore, using the SPC and EPC integrated control technology can better ensure the quality of the products. This paper outlines the features of the SPC and EPC method during the manufacturing quality control, putting forward a process control system which integrates the EPC and SPC method and studies the informational interface technique, the intelligent integration technique and the harmonious control technique for the two method, and then analyzes the integrated technique and the quality guaranteed technique for the two method through a specific manufacturing process example. The application of this technique not only guarantees the needs of the individual parameter, but also the distribution regulation of the group of a same parameter, so it may markedly improve the quality of the manufacturing process. Therefore, overall product quality is improved.