Systems integrators live and die by the accuracy of their project estimates. To improve ad hoc estimation methods that were producing inaccurate results, EDS began capturing actual project data in a central repository and trained estimators to consult the repository as a standard part of the estimating process. Sixty-five percent of projects now come in within an exemplary 10% of both effort and duration estimates. EDS's repository holds data on over 10,000 projects and provides its estimators with a key resource to make EDS more competitive.