March 17, 2006: A Federal Reserve Bulletin article, Industrial Production and Capacity Utilization: The 2005 Annual Revision (161 KB PDF), is now available online. The article reviews the 2005 annual revision to the index of industrial production (IP) and the related measures of capacity and capacity utilization. It discusses both the changes in estimation methods introduced in the revision and the revised estimates of IP, capacity, and capacity utilization.