The manufacturing of Printed Circuit Boards needs three primary factors that must be satisfied and these three are most probably not available with one PCB board manufacturer. For this you need to check with both small scale as well as large scale Printed Circuit Boards manufacturers.
The first thing to look for is the time factor. If you need a customize Printed Circuit Boards then time is of great importance, as personalization or customization could take up a substantial amount of time. A smaller PCB board manufacturer may produce a large batch of customized Printed Circuit Boards in a short time period.
The lack ability of mass production in a small PCB company can be offset by few small advantages that a small PCB company possesses- personal attention of sales to the customer’s needs which might not be possible get from a large scale company.
Then again, a large scale company has its advantages too, which is its ability for mass produce on a huge scale and this could help you in cutting down on your time drastically in mass production. Even though large scale production won’t have a great effect on the specific quality of the products and there might be chances when the quality might get hampered.
At the end, it depends on you to choose whichever one seems like the best option for you. You need to look for time and cost effectiveness, for that you need to make a proper balance betwee.