Status Change in Elsevier
Everything is explained here in detail:

https://service.elsevier.com/app/answers/detail/a_id/5971/kw/track/c/10528/supporthub/publishing/


  Decision in Process The Editor has registered a decision in the system. The decision may need to be confirmed by the Editor-in-Chief first. The Editor will email you directly with the overall editorial decision, Editor and/or reviewer comments, and further instructions.