There are some jobs that anyone can do comfortably and others that only experts can do. For instance, surgical procedures can only be done by experienced surgeons. Similarly, circuit board assembly can only be done by experts in the field. If you need to assemble multiple PCBs, it is best you hire a competent service provider especially if you will be assembling minute components onto the board. The ideal service provider should be able to assemble and test the assembled boards.
The fees charged by the shortlisted PCB assembly firms must be checked because you want to assemble all the boards cost-effectively. Only the most experienced service providers should be accorded any consideration. Since a contractor may cause damage to your printed circuit boards, you should only consider firms that have a valid insurance policy and a performance bond. This will help to protect you from liabilities.