The construction industry’s luddite reputation is well deserved, but it’s modernising fast. It’s had no choice since the government set a deadline for every publicly procured project to be delivered using building information modelling from 2016. BIM is CAD on steroids – a detailed computer model backed by a comprehensive database with information on every building component. But does the finished jigsaw ever look like the picture on the box? It turns out that it does. At Telford Homes’ first BIM project, the mechanical and electrical engineers followed the model to the letter, with the result that the finished plant room looks strikingly similar (if a little bit grubbier). I asked them how they managed it in this case study for the BIM+ website.