The technical and dimensional aspects of the design are then resolved using a Computer Aided Design (CAD) program from which final component and product drawings are produced. Production parts will then be produced from these drawings. Often processes such as laser-cutting and CNC routing can be performed directly from the CAD files, eliminating human error in transferring the information to those processes.

In some cases it is still necessary to produce a prototype or pre-production sample of a product, whether for testing, customer approval or for presenting the concept to the customer's management or client. These are generally produced by hand and can be a costly exercise - although larger projects often demand this final stage of the design process before committing to the final specifications of the unit.