John Radcliffe is a research vice president at Gartner in the information management team. His main research focus is master data management (MDM), with a special emphasis on MDM for customer data and creating the "single view of the customer." He has served as chair of Gartner's U.S. and EMEA MDM Summits and was lead author of Gartner's Seven Building Blocks of MDM. He analyzes and comments on the MDM market and helps clients achieve successful MDM programs.