@Fighton96 In my school, it’s full IB Diploma. Like if for example you get a 30/42 when you applied to the university, but got 26/42 as your final score, that’s a 4 point difference and that’s quite far from your predicted scores.
I don’t know what your school does with a non-full IB program, but it should be similar to the real IB grading system.