Functional Test (FCT) is an essential process for electronic contract manufacturers (EMS). It is a critical step for quality control in the factory, but its implementation implies different requirements than those of the rest of the production processes, which can be more automatic thanks to the manufacturing documentation.

In the case of the functional test, in addition to the manufacturing documentation, we must know the functionalities and technical specifications of the product and also have a procedure or test sequence that allows to verify all functions in the most robust and optimal way possible.