This report describes Copenhagen (Denmark) Business School Library's (CBSL) use of performance measurement to manage the quality of library services and facilities. The CBSL quality management program consists of: a statement of strategic goals of development and operation, including a focus on users, good service, efficient internal functions, and optimal use of resources; a program for staff training and development with plans for manuals for operations and service; an evaluation procedure; and a procedure for corrective action. Performance measurement is a necessary instrument for quality management. It makes possible the assessment of whether or not a library fulfills its goals and objectives, and whether or not particular objectives remain relevant. Performance measurement cannot provide a totally objective and comprehensive image of a library's function, but is still necessary for a quality conscious library. Management is an art, not a science, and decisions must be made on the basis of approximate knowledge and intuition. The report covers: (1) librarians and management theories; (2) performance measurement, evaluation, strategy, corrective action, and the CBSL quality management program; (3) the concept, purpose, and types of performance measurement; (4) a fictional case study measuring performance of an interlibrary loan program; and (5) problems of performance measurement that affect quality management. A brief discussion with the author is provided. (Author/SWC)