Design for Testability (DFT) services help to identify possible snags with PCB designs before starting mass production, minimizing defects while maximizing reliability and repeatability. The In-Circuit Test (lCT) can pinpoint defects in the board from the assembly process, such as component mismatches, misplacements, or missing components Yuyuancheng also delivers functionality tests, whereby PCBs are tested in their final production environment to ensure proper functionality according tospecs.