[en] Design control in its simplest form involves control of drawings, specifications, and calculations to ensure uniform adherence to design bases; a matching between as-built as as-designed, and proper updating of drawings, specifications, and calculations to reflect the as-built. This is not sufficient to maintain availability however. Other lists and data bases that directly affect operations and maintenance need also to be updated: operator and staff training programs to reflect new design, maintenance schedules and equipment histories to show new components, and spare parts additions and deletions to support the new devices. Much has been done to make better design change packages, but too little is still being done to follow through completely with the design change process. This paper provides a review of cases in this area