When it comes to PCB prototypes, most customers do not want to know what the manufacturing process involves because all they want is a functional PCB prototype that can be used for mass production. If this is your case, look for well-known companies with a good name in the market.
They should be able to offer assistance in their needs and should have a good reputation with regard to the creation of PCB prototypes. They must also have the necessary investments and infrastructure to facilitate comprehensive production, and their staff must be accessible, available and open to new ideas and challenges.
Of course, you must obtain a deadline for the PCB prototype in question, and the company in question must also offer a detailed analysis of its production process with an estimate. Request a detailed budget because the costs must be scalable. To know your work better, ask about references.
The manufacturer in question must have a team that can maintain the integrity of the PCB prototype while tracking the demands of customers. In general, PCB prototypes are tested several times and more than a few independent tests are required to ensure that all functionalities work as expected. The PCB manufacturers in USA will deliver good results and cover all possible problems in a professional manner.