When a journal displays the “decision in process” status, it means that the editorial board is in the process of making the final decision about your paper. At this stage, the editor will go through the manuscript and reviewer comments before coming to a decision. I think it would be reasonable to write to the editor to inquire about the status of your paper if you haven’t received a response even a month after the last status change.
I have submitted my paper in the Journal of Manufacuring Processes. The paper went to "under review" and after 3 months it went to "decision in process". What does it mean? Is it a positive thing or might I have a straight rejection? Please answer.