What is the priority order for EMC rectification of edge boxes?

EMC rectification of edge computing boxes should follow the priority order of source-path-affected object. The source is the noise generation point, such as a DC-DC switching node or clock source. The path is the propagation channel, such as power lines, signal lines, or space. The affected object is the sensitive chip. First, rectify the source by adding ferrite beads (PBZ1608E600Z0T) for spread spectrum analysis. Second, block the path by adding common-mode inductors (CML3225A-510T), shielding, and grounding. Finally, reinforce the affected object by adding ESD diodes (ESD5V0D8B, etc.). This order requires minimal investment and yields the fastest results. For example, if an edge box has excessive RE (reactive power), first add ferrite beads to the clock source to reduce it by 3dB, then add common-mode inductors to the interface to reduce it by 6dB, and finally improve the shielding by adding conductive foam. This will pass the test without requiring redesign. Following this order can shorten the rectification cycle by 50%.