I build virtual prototypes on the computer of objects that will be built on the shop floor. Full-scale layouts are generated from my 3D models as well as parts drawings and fabrication drawing. 3D drawings on the shop floor make easier for the crew to clearly understand what they are building. Dimensioning the 3d model is a great way of minimizing errors. The best of both worlds is a 3D model and an orthographic projection on the same sheet of drafting.
The 3D model clarifies details that are not clear on the original design drawings. Whether the project is scenery for the theatre or architectural millwork building experience is crucial for the technical designer to be able to draw accurate plans.