To make sure that electronic circuits last a long time, it's important to perform an initial test (known as burn-in) on all PCB boards right after they're made. This helps catch any early problems that might arise due to manufacturing flaws. The idea is that it's better for the board to fail during in-house testing rather than later when it's being used by the customer.
As time goes on, electronic circuits can experience wear and tear, which can eventually cause issues. While proper maintenance can delay this for a while, it's inevitable that these problems will arise at some point.
However, the most crucial concern is the possibility of failures during the middle phase of the circuit's life. Designers need to keep this risk in mind. This risk can be minimized by choosing the right components, implementing effective thermal design, and using techniques like derating and other calculations.
