What do you mean my board test stinks?

Board level testing account for the functionality and performance of all the device placed on the board, and also account for how the devices are assembled on to the board and how the device interact with one another. Three areas of board and system level testing are structural testing, functional testing and parametric testing. Structural testing focuses on the assembly process given above. Parametric tests have well defined metrics like bit error rate and jitter. Functional testing are targeted very less in order to target the defects.