Describes operations research as an important management tool that can aid library managers in effectively using available resources and as a set of analytical tools that can enable researchers to better understand library and information services. Early history, definition, models, applications to libraries, and impact are noted. Twenty-five…

Nine articles in this festschrift for Herbert Goldhor explore relatively new and innovative approaches to problem solving in libraries. The articles identify and discuss methods and techniques of applied and evaluative research, consider conceptual and practical issues related to problem solving in libraries, and recognize Goldhor's many…

Reviews research on obsolescence (decline over time in validity or utility of information), citing two major state-of-the-art reviews and subsequent research involving citation studies and use studies based on circulation and reshelving statistics. A problem-solving management model developed to aid libraries deal with obsolescence is discussed.…