The purpose of this study was to determine if the Program Evaluation and Review Technique (PERT) which was developed by the U. S. Navy as a management tool could be applied to a library process. Several chapters are devoted to an explanation of the tool and its advantages and limitations. Its potential value in library management is also discussed, and six criteria are set up for determining whether or not PERT should be used. PERT was applied to the book cataloging process at Brigham Young University, Provo, Utah. A network of activities and events was developed, and three time estimates were used to obtain a critical part. It was concluded that PERT can be used successfully to show interrelationships between cataloging activities in the library. (JG)