A review and analysis of library availability studies

Abstract

The concept of availability (can a library patron locate a desired item on a library's shelves?) and Kantor's branching method for identifying barriers to availability (acquisition, circulation, library operations, and the user) are described. A literature review identifies more than fifty investigations of availability reported in journal articles, dissertations, theses, or conference presentations during the last quarter century. The mean availability rates for known-item searches by actual patrons of 61.3 percent or 63.1 percent (depending on the calculation method) are quite similar to the 61 percent found in an earlier review covering the years 1934 to 1984. Analysis of availability in Kantor's branches shows variation among libraries, but no branch standing out as a major barrier. The paper concludes with the argument that the traditional availability measure can be modified for use as an objective, user-centered evaluative tool in the electronic environment.