Entire publication process takes 4 -24 months to process, which is normally 12 months after your first submission. Submiting papers during your research study. Publication is the key measurement for graduation or application of academic position.

Two main tasks in your research. 1) Graduation on time 2) Publication in Tier-1 ISI journal.

Thesis and journal papers have no issue on self-plagiarism. Therefore, PhD candidate can choose to graduate with publication. You need to put all the publications with a relative short introduction to link up all your works being published. Your publication proved your research works being recognised by the reserach community.

If you submit the same works to two journals at the same time, it offenses the submission rules. For submission to the journal, athors need to declare that the works have not been submitted to other journal at the same time. It prevents the same paper being sent to the same experts for review. If you purposely to publish the same story with same discussion and same conclusion to two different journal, it falls on the category of self-plagiarism.

Journal paper is just a process of communication to inherit knowledge in a proper written format.