A prototype Project Management Quality Cost information System, PROMQACS, was developed to determine quality costs in construction projects. The structure and information requirements that are needed to provide a classification system of quality costs are identified and discussed. The developed system was tested and implemented, in collaboration with a leading Australian construction contractor, so that the information and management issues needed to develop PROMQACS into a software program could be determined. The system was initially used to identify the cost and causes of rework that occurred within selected projects being procured by the contracting organization. PROMQACS can enable project participants to identify shortcomings in their project-related activities so that they can take the appropriate action to improve their management practices in future projects.