can anyone brifly explain about the actuall test proceesing
Not really. Unforunately, your question is much too large to answer without writing a book (or two).
I am more than happy to answer any questions you have if you could be a little more specific?
What do you know about the topic already? Maybe we can started from there and go forward.
"Not every solution was derived to address an obvious problem" - Me (quite recently indeed)