Good understanding is critical to good testing. So how does one understand a system well quickly?
Good understanding requires to ensure that tea cup is only partially full i.e. know only what you require for now, defer what is not required so that you do not just know, you understand. It is not attempting to know all.
Before you jump into testing anything, Understand. Don‘t be fazed by complexity nor be worried by no prior knowledge. Apply the onion peel keeping the tea-cup half filled.
Read the below article by T Ashok, Founder & CEO, STAG Softare, that was published in the Apr-May 2013 issue of ezine, TeaTime with Testers.