The National Center for Higher Education Management Systems (NCHEMS) has completed the development and demonstration of a library statistical data base addressing the management needs of academic and public libraries. A pilot test of the data base was conducted in late Spring of 1977 in five Pennsylvania academic libraries to determine feasibility and utility of data collection techniques, cost constraints limiting data collection; sophistication of existing data systems within the pilot-tested libraries; and the areas of the data base requiring further improvement. This report documents the methodology and major findings of the pilot test and provides an evaluation of the data base in a working environment. The general finding was that, although the data base needed certain revisions and refinements, it represented a valuable and necessary management tool for library decision making. Problem areas in the data base were identified as internal inconsistencies in the formats and levels of aggregration employed in the pilot test instrument; variances in materials and collection descriptors; and costing of selected activities within programmatic areas. Further testing of the data base was recommended prior to its implementation and adoption. Appendices include copies of the pilot test instrument and the evaluation instrument, a summary evaluation report, and a summary of actions taken by NCHEMS as a result of the pilot test. (Author/JPF)