@AlwaysMoving: Northwestern University does not have an undergraduate business school.
Also, Northwestern University is well known for ease of switching majors & ease of double or triple majoring.
Maybe your neighbor lacks certain pre-requisite courses for engineering or did not earn an acceptable grade in a required pre-requisite course.
If your neighbor is trying to transfer into a business major as an undergraduate, it will be very difficult since NU does not have an undergraduate business major.