Abstract: In the era of big data, digitalization has a profound impact on our study, life and work. Digital design also gradually forms norms in daily work, and has a subtle influence on rapid product design and innovative design. This paper analyzes several kinds of product design scenarios based on data and Cpk tolerance analysis, and arranges the methods of defect control, process control and module selection in product design, so as to promote how to combine Cpk tolerance analysis tools with new product design and guide us to design optimization, process control and quality inspection in the process of new product development, so as to improve the efficiency of product digital design.

Key words: Cpk, Tolerance analysis, Analysis of scenarios, Digital design