You cannot sue them when they tell you clearly that their processing time is 12 months. That’s ridiculous. You can only sue them once they exceed their own posted timeframe. I know that this is not what you would like to hear and that unfortunately the DOS can keep changing the processing time like a moving target, however, you are not entitled to a decision before the official posted processing time is elapsed. The DOS will most likely request the judge to dismiss your mandamus. curious though, who advised you to file this mandamus lawsuit so early?!