Got H1 B WAC number waiting for petition approval

Hi, My H1 B petition was approved by USCIS and i have received WAC number ,My company was applied this on regular quota (not premium).Now I am tracking my H1B petition with WAC number in USCIS site and it is in initial review status,still there are 2 more tabs (decision and post decision activity ). When this process will complete. one of my friend petition status is in post activity decision he also applied on regular cap and normal process how this process will be validate , When is the last date to review petitions and to get approved. Awaiting for your response

Regular processing can take 2-6 months.