Building Information Modelling, or BIM, is the biggest thing to happen to the construction industry in a generation. By allowing project teams to create complete virtual models of a building before they get anywhere near the site, it promises to dramatically improve speed, efficiency and reliability, eliminating expensive mistakes, and enabling better facilities management and, eventually, demolition too. But so much change is inevitably perceived as a threat too: to people’s jobs, to long-established practices, and to traditional definitions of legal responsibility when things do go wrong (because innovative new ways of working always mean innovative new ways of cocking things up). In less than three years, teams working on every centrally procured government project will have to use BIM, which means that construction firms across the industry – large and small – need to start implementing it now. This 16-page supplement, which I edited and partly wrote for Building magazine (sponsored by technology vendor Autodesk), explains how they can do it.