The objective of the project was to develop a method of measuring benefits, to provide criterion functions for quantitative planning in university libraries. The approach chosen was to show what benefit estimates lie behind actual qualitative planning decisions and to build them into exact planning models. The chapters include: library products and services; maximization of library resources; simulation of user decision processes; problems, purposes and methods of data collection; a current awareness service for social scientists; the use of collected data, a historical review of the project, and suggestions for further work. Appendices provide information for model-building for the inversion process, library stock, bookstock, welfare economics, data guides, a prospectus for university libraries, data conversion and surveys of unrecorded use. (AB)