Duncan Cartlidge, FRICS, is a Chartered Surveyor with extensive experience in the delivery and management of built assets, as well as providing education and training to a wide range of built environment professionals and contractors. Author of several best-selling books including Construction Project Manager’s Pocket Book, 2nd edition, and Estimator’s Pocket Book, 2nd edition, both published by Routledge. www.duncancartlidgeonline.com