The traditional PCB design goes through the process of schematic design, layout design, PCB production, measurement and debugging.

In the schematic design stage, due to the lack of effective analysis methods and simulation tools, pre analysis of the transmission characteristics of signals on actual PCBs is required. The design of the schematic can generally only refer to component data manuals or past design experience. For a new design project, it may be difficult to make the correct choices for component parameters, circuit topology, network termination, etc. based on specific circumstances.

In PCB layout design, there is also a lack of effective means to conduct real-time analysis and evaluation of the impact of stack planning, component layout, wiring, etc. Therefore, the quality of layout design usually depends on the designer's experience.

In the traditional PCB design process, the performance of the PCB can only be evaluated after production is completed. If the performance requirements cannot be met, multiple tests are required, especially for the parameters in the schematic design and layout design that are difficult to quantify and have problems, which need to be repeated multiple times. In the context of increasing system complexity and shorter design cycles, it is necessary to improve the PCB design methods and processes to meet the needs of modern high-speed system design.