doesnt tape out check the design correctness.. makin use of random input chjeckin with the output.. i mean check the logical correctnesss of our design.. u have to verify ur datahseet after the tapeout, i mean cross check them. add scanflops or scan cells.. somethin like that in order to correct wrong outputs.. somethin of that sorts.. STA is also very important..if u go thru MAGMA design flow you wud understand the basics.. i guess magma is one tool which has a comprahensive rtl to gds II format..
with regards,