Describes the development of a taxonomy of the value of library services based on users' assessments from five large research libraries. Highlights include empirical and derived taxonomy, replicability of the study, reasons for using the library, how library services are related to time and money, and a theory of value. (LRW)

Results of a study that evaluated 21 diverse services at 5 major academic research libraries demonstrate that a cross-functional approach to library services is feasible. Findings also highlight a new measure of impact, which is a weighted logarithmic combination of the amount of time that users spend interacting with the service, combined with a…

The first of two parts, this article discusses concepts of value and establishes a theory of use-oriented value for information and information services. Examines the notion of value in philosophy, economics, and library and information services; explores the connection between value and relevance; and develops models of information use and…

The second of two parts, this article develops a taxonomy of value-in-use for library and information services based on user assessments and proposes methods and instruments for similar studies of library and information services in general. Divides value of services into three classes: reasons for use; quality of interaction; and worth, benefits…

Discusses the challenges facing digital library evaluation and suggests a conceptual framework for evaluation derived from the systems approach. A review of evaluation efforts in research and practice concentrates on derivation of criteria used in evaluation. Essential requirements for evaluation are stated. Discussed are constructs, context, and…