The simultaneous design process was developed as a result of the need to make parts with large surfaces in a short period of time. The main advantages are: automated mixing, with the help of simultaneous projection of the resin and the catalyst, as well as the controlled application of the entire set of materials: resins, catalyst and glass fibers. In addition to the above, the thickness of the piece is constant and the working staff does not need to be very specialized. Parts that can be used in almost all fields can be produced.