Overseas production PCB assembly is another story. It’s like trying to tame a beast, giving it constant attention. Otherwise, it’ll turn on you. That is the umbrella OEM criteria covering a wide array of concerns. First and foremost, the OEM should recognize that overseas CMs often use different, but similar materials which are made for their local markets and components to assemble PCBs. In this regard, when component shortages occur, the OEM must make sure the CM has sufficient clout to obtain allocated product.
Chinese and Taiwanese components have different designations and manufacturers than U.S.-made components. U.S. parts are therefore replaced with overseas devices of equal or similar value. Generally, no issues are involved as long as the OEM product is mature. However, if the need to debug arises, the OEM has new or unusual components to deal with and that poses an issue.