There are four main interdisciplinary organizational models:
- Admit and Confer Degree: The first model admits students and confers degrees much like a department but has no departmental structure. These three are all in the College of Liberal Arts.
- Admit and Graduate from Department: The second model admits students to the program directly but the students eventually graduate from the department of the major professor. Degrees at Purdue are awarded only by programs which are approved by the Indiana Commission on Higher Education.
- Administer as Concentration: The third model may review and recommend admission but students must be admitted by a department. Students have a Concentration added to their transcript upon completing requirements set by the program. They may or may not be required to complete requirements of their home department in addition to the IGP requirements.
- Admit to Independent Interdisciplinary Graduate Program: The fourth model may review and recommend admission but students must be admitted by a department before consideration by the I-IGP Admissions Committee. This program is designed to be highly flexible in order to allow participating graduate students to tailor their graduate coursework and research to their individual needs and interests while at the same time providing appropriate faculty oversight. The goal is to attract outstanding graduate students who are interested in unique, interdisciplinary research areas that might not otherwise be available or apparent from traditional programs.