Many manufacturers that can only produce PCBs, unconditionally processing PCBA, will lose customers who need simultaneous processing. Such customers choose manufacturers that have the ability to do the both at the same time, or choose a SMT factory to let the SMT factory purchase PCBs.
Many people may ask why the SMT factory can purchase PCBs, and why the PCB factory does not contact the SMT factory. It is very simple for patch manufacturers to purchase PCBs, only need customers provide them with production drawings and production processes. Moreover, the PCB market price is very transparent and easy to purchase. PCB manufacturers do not understand the various components and prices. It is difficult to contact the patch factory for SMT production, and only focus on the production PCB.

Since 2009, PCB manufacturers have gradually expanded their plants while producing PCBs and added PCBA processing lines. This PCB one-step approach has been recognized by many electronics manufacturers.
This method of simultaneous processing has advantages and disadvantages. Generation processors are increasing in profit margins, but at the same time the risks are increasing. The main reason is that the components required for each electronic product are different for the purchase of components for the customer. Even if the same product, the design drawings are different, and the components used are different. If the components model purchased is error, the board and components will scrapped at the same time. The direct economic losses are also difficult to estimate. The increase in human and material resources is also inevitable. Under the pressure of market competition, the simultaneous processing of PCB and PCBA is also inevitable.