There are two very important methods of construction that PCB assembly employs. They are through-hole and the surface mount. Both these forms of construction are very standardized and used by board manufacturers all over the world. To manufacture a PCB, the environment within the factory is highly controlled. There is hardly any human presence and the people that work in such places only supervise the machines that build these boards. When an employee enters this factory, he/she is supposed to place their hands on a static discharger. A tiny static charge within the body can seriously damage electronic components and affect their inner workings.

Processors usually have this problem. Once in the factory the employees who are in direct contact with the assembly line are required to wear a dust free jumpsuit that is white in color. Some companies also have their assembly lines vacuumed or air so the process is completely free of dust and pathogens. Such assembly lines are restricted of human presence. If something goes wrong with the assembly line, the service person entering the assembly room will have to wear a white dust free jump suit and carry an oxygen unit to breathe, as there would be no air inside. In printed circuit board assembly, all electronic components are fixed to the board using a metal solder. In manufacturing PCBs, the soldering happens directly in the assembly line without the presence of human hands. Large volume production requirements need a dedicated assembly line for manufacturing.