The college aims to do reviews of each unit on an approximately decennial cycle, though the specifics of the timing for a given unit may be affected by a number of other circumstances which could delay or accelerate the timing of a review process.   For Interdisciplinary programs the first review is an internal review only (and ideally happens within about 5 years of creation), and includes all the steps outlined here with the exception the visit by an external committee.  Subsequent reviews of interdisciplinary programs follow the normal procedure (and timing cycle) and include the external review.