Correct design decisions are the efficient synthesis of structural, geometrical, material and economic requirements. To keep the increasing complexity of modern structures under control, the praxis requires even more insistently the use of new, computer-based planning methods.

In order to enable such computer assistance in the first place, it is necessary to formalise the actual activity of the planning and to transfer it into a consistent, model- and knowledge-based algorithms.

Structural design theory is the result of these requirements and hence provides the basal framework for innovative software solutions to the structural planning and also the education of future designing engineers.