How to control EMC consistency during mass production of concentrators?

During mass production of concentrators, slight differences in component batches and manufacturing processes can lead to inconsistencies in EMC performance between products. Controlling consistency requires management across design, materials, and production. In design, select EMC components with high tolerance and stable temperature characteristics. Develop a rigorous "Key Component List," clearly defining the model, brand, and allowable range of key parameters for EMC-related components (such as filter capacitors, ferrite beads, and TVS). In production, establish "Key EMC Process Control Points," such as the soldering direction of filter inductors, the installation pressure of the shielding layer, and the torque of grounding screws, and monitor and conduct random inspections. Perform EMC key tests (such as conducted emission scanning) on samples from each batch or periodically, and establish Statistical Process Control (SPC) charts. Audit suppliers. Through end-to-end control, the EMC performance fluctuation of mass-produced concentrators can be controlled within ±3dB.