Presents a decision theoretic model that minimizes the costs of the material selection decision process by using formal methods to rank materials. Illustrations of the process are provided, and an implementation method using MARC records is described. (Author/CLB)

Discussion of operational effectiveness in libraries focuses on a modeling approach that was used to compare the effectiveness of a local interlibrary loan system with using a national system, the British Library Document Supply Centre (BLDSC). Cost figures and surveys of five academic libraries are described. (six references) (LRW)