The first part of structure formation and simulation of technical systems explains structure formation. Structures graphically depict what, how, and with what calculations should be performed. They are the foundation of simulation. Structures can be calculated by all common simulation programs. Through structure formation, components and machines can be examined and optimized as if using a test stand, before they are built and their components procured. This is an invaluable advantage, as errors are identified and corrected during the design phase.