The environment for today's cost estimator and analyst is certainly very challenging. Computerization, software, robots, composites, uncertainty, and inte grated systems all challenge the applicability of our existing tools and techniques. These Proceedings serve to document some of the completed and on-going re search in the dynamic world of costing. This document is published in conjunction with the first Society of Cost Es timating and Analysis (SCEA) National Conference, held in Boston, MA, June 19-21,1991. It serves to foster and promote cost research, and to provide a forum to report...