Designers and producers of instructional materials lack a common design language. As a result, producers have difficulties translating design documents into technical specifications. The 3D-model is introduced to improve the stratification, elaboration and formalisation of design documents. It is hypothesised that producers working with improved documents (n = 8) show a more efficient translation process and more satisfaction with the design documents than producers working with traditional documents (n = 8). As expected, in the improved documents group, a higher agreement was found between the design documents and the technical specifications, which also required less time and less perceived cognitive load for their production. There were no differences in satisfaction with the design documents. The study shows that designers, working with the 3D-model, are able to improve design documents, resulting in a better translation process.