Methods to implement & qualify the circuit changes on Proto-PCB to reduce the ESD test cycle time

It's very important to test the changes implemented in the schematics of an existing board before going to the production. For this we will have to implement the circuit changes of the next revision board on the existing prototype or first revision board and we will try to simulate the tests and get good confidence of result before going to production. Most of the times when we implement the changes we see failure scenarios. These failure cases occur based on the way we implement the external changes. Objective of this paper is to give guidelines to implement the circuit level changes in a better way.