Similar to my previous post, RFV - which stands for Ready For Visa - is an important log by the IO w.r.t. a case where s/he finds it complete from his/her side... And notifies some other cell/dept./section to assess/act on the requested activities pending the forwarding this case file to PHEP Section (for PPR/visa issuance). This, usually, signifies that this case file is now finalized from the IO's desk.
NOTE:
1. Both, RFA & RFV may not only be marked for ECU... it could be for any other dept. as well.
2. ECU is specifically created to address the backlogs. IMHO they deep-scrutinize the files submitted to them with an intention to "eliminate" rather than "select" applications. This is a severe screening process... and I again opine that not all files go there... but why do some (go to them) is beyond me, or I do not want to comment on it.