When the submission status changes to decisioninprocess, it means that the editorial department of the journal is making a decision on your paper. At this stage, the editor will review the papers and comments before making a decision. If this status has not changed for more than one month, you can send an email to consult the editor.
The manuscript processing flow of each journal will be slightly different.
It is possible that a periodical will appoint an editor as soon as it receives the contribution. While waiting for the editor's reply, the editor will conduct technical review of the manuscript to speed up the paper processing, which may be the reason why the state directly becomes DecisioninProcess.
However, the paper becomes a decision-making process without peer review, which may mean direct rejection.
In the process of technical review, if editors find that papers do not conform to the categories of journals, do not conform to the rules of journal submission, or lack moral approval documents or disclosure statements, they may reject them directly, which is called desk rejection.
If this is the case, if you can fill in the missing documents or adjust the papers according to the regulations of the journal, you can still re-submit to the same journal.