I have a friend from MAIT and he has better knowledge about the branch change at the institute. Here is what he had to say.
If you want to upgrade your seat from one branch to another you need to work hard and get a good percentage(80+). Then only you will upgrade your seat.
During or after the end term exams of the 2nd semester the university will release forms to change branches. After getting the form you have to fill in the details and submit the form to your college administration.
Within the span of a week, the university will release the list of students' names who applied for the upgrade. Check your details if there is any mistake, consult the college administration.
After a few days, the new list will be released by the university regarding the branch upgrade. Once your desired branch is upgraded, you should visit the dean of the college and he will discuss further formalities regarding the branch upgradation.