The figure shows block diagram of circuit-board production.
It starts with delivery of circuit-board material. Then the process goes to cutting and spraying with fire retardant. At the end of previous step, cleaning is starting.
After that, main part of production is started. It consist of loop with different endings. Automated IC attachment and soldering is the start of that. The second step of cycle is visual inspection and quality control testing where based on result two different paths exist. The first is Chips from rejected boards thrown away and production is completed. The second is Final testing which has also two choises. If inspection and testing are not enough then attachment and soldering starts again. If the step is completed succefully, packaging begins straight away. At the end product delivered to factories
In summary, the diagram exhibits complex process with different results and several repeating checks.
