Leyland Trucks Design Team built physical mock-ups of trucks to ensure the parts fitted together as the designers intended and to be certain there were the requisite clearances during the manufacturing process. We used immersive visualisation to link Leyland’s designers with its manufacturing engineers and helped to cut both design rework and time-to-market. Prototypes now roll off the production line designed entirely with the use of advanced simulation and visualisation. The change from physical static build to VR stage-by-stage build was radical for Leyland Trucks. Two days before the new truck variants were scheduled to go down the production line, workers from the shop floor were shown the model and taken through the 40 stage manufacturing process. This familiarised them with the new parts and their new roles in a single session.