Shelf arrangement of documents is an important technical function of a library because it determines how effectively documents can be stored, located, retrieved, and used. In university and research libraries, proper shelf arrangement also supports the systematic organization of scholarly literature that forms the basis of informetrics and scientometrics. However, several practical and intellectual problems may arise in arranging documents on shelves. One major problem is misplacement of documents. A document may be returned to an incorrect shelf or placed in the wrong sequence because of human error. Even a small deviation in call number, class number, author mark, or accession number can make a document difficult to locate. In research libraries with large collections, such errors can remain unnoticed for a long time and affect the accessibility of important scientific literature. Growth of collections is another significant problem. Libraries continuously acquire new books, journals, reports, conference proceedings, theses, and other research materials. If shelves are filled completely, there may be insufficient space for newly acquired documents. Frequent shifting of documents becomes necessary, which is time-consuming and may create additional opportunities for misplacement. In scientometric collections, where