Through the SPC system, process analysis, control chart analysis, histogram analysis, trend analysis and process capability analysis can be performed on machined product parts. The batch quality index (standard deviation, CPK) can be analyzed according to different latitudes such as product, workshop and process, such as trend graph analysis and comparative analysis by year, month and week. The fluctuations between batch and batch of product parts can be visually seen. In the heat treatment and forming workshop, the automatic process data is used to obtain the process data, and the actual process parameter graph can be drawn by statistical analysis. The comparison with the process requirement parameter graph is used to analyze the execution of key parameters of the heat treatment and molding process. Compliance. These analysis tools are applied to different stages in the SPC system, focusing on different aspects, ensuring the realization of the SPC system goals, and also forming and exporting analysis reports by analyzing the data.