During design engineering & optimization, the 3D CAD model of the concept design will be completed and will be validated by extensive calculations and simulations. If relevant, prototyping and testing (see below) of the solution is an important part of this work. Each validation will again lead to new insights. As such, several iterations of designing, CAD drawing and validation will be performed, until the results match the requirements and expectations. The final design will be elaborated into a fully functional product design that will be presented.