Subplans within the Student Information System (SIS) are used to modify a plan (major), whether in a degree or a certificate. Subplans usually consist of a group of courses within a student's major that represent a specialization, concentration, or track within that major.
For example, English might have a number of subplans attached to the English B.A. (e.g., film studies, literature, writing, or literacy). These are concentrations of specific courses and serve to further define the student's English program of study.