Agreed with Sigad. The way @marko.hakamaa has described it is that the investigation is completed, and then you get to the DoDCAF's adjudication system. From my understanding, just because the investigation closes does not mean adjudication begins immediately. Rather, you're in a pool and the adjudicators get assigned cases randomly from the pool (I'm sure there is some algorithm used, but that's a secret).
From adjudication, I think that the adjudicator can give a thumbs up, thumbs down, or request more information. Marko has stated plainly that adjudicators have 90 days to make a decision after being assigned your case.