The guideline illustrates the functions and scopes of the bionic optimization methods with examples. By the evolutionary process biological load-bearing structures such as trees, bones, claws, and thorns have optimally adapted to the stresses they are subjected to. This natural optimization can be seen by their design principles. Derived from this biological principle and by use of the FEM optimization methods for technical components computer-based bionic optimization tools were generated: as Computer Aided Optimization (CAO), Soft Kill Option (SKO) and Computer Aided Internal Optimization (CAIO). Purpose of these methods is an optimal materials application for weight reduction or enlargement of capability and lifespan of the components. An even simpler and faster method that can be used by every design engineer is the "Method of Tensile Triangles". The wide range of applications of bionic optimization methods together with the relative ease with which users are able to understand and apply the methods enables users to perform component optimization early in the design process. The guideline is intended primarily for designers, developers, engineers, and technicians, but also in general for all persons entrusted with the design and evaluation of load-bearing structures.