Libraries are under pressure to prove their worth and may not have achieved this fully successfully. There is a resultant growing requirement for value and impact measurement in academic and research libraries. This essay reviews the natural history of library performance measurement and suggests that proof of worth will be measured by the…

Presents an empirical model, previously used to examine characteristics associated with perceived quality in schools of library and information science, that may be utilized in future studies. Variables and their correlation with a discriminant analysis function are listed, and a histogram depicts score distribution. (four references) (EA)