Depends on the issues and the category.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.
There is no set time-frame for cis to issue a decision after the interview. If more than 90 days have passed since the response to the RFE was received by cis you can make an INFOPASS. The local office has the file and will be in a better position to provide you with a status report. If the case was, however, referred for investigation then it can take a long time before a decision is issued.