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Periodic weeding of the library collection is necessary to maintain the overall quality of the collection by removing obsolete, inappropriate or damaged materials. Weeding has been shown to improve patron perception of library quality and lead to increased circulation. Items may be transferred to the Storage collection as an intermediate step prior to withdrawal.


Low usage, especially zero usage within a given time frame, is the primary criteria for weeding. This is not a preference for popular over scholarly content, rather it is a recognition that lack of use is indicative of any item which no longer supports the curriculum of the university.  The appropriate time frame will be determined subject by subject. Other factors to consider in the weeding process include: