First of all, it is important to note about NITIE is that it is not an undergraduate School where seats are fixed for different branches. In fact, it is a professional Masters school which is referred to as the Mecca of Supply Chain Management.
One of my friends is enrolled in the PGDIM which is an MBA equivalent course. PGDISEM is also an MBA equivalent course here. It is just like any other MBA college, there is no such quota for any specific branch. You need to clear the selection process that is CAT followed by GD and PI.
Though in NITIE there are few MTech equivalent courses as well such as PGDIE, PGDMM, etc, and it takes admission through GATE.