SO is a well proven and state-of-the-art planning tool for use in the field of plant and automation technology. The core of the system is the schematic layout which is the basis for the planning of electrical as well as fluid-technological installations in complex plants and for creating high quality documentations in the CAE target system. SO is not only an efficient design instrument but also the communication basis for project discussions. During the 15 years of its development history, SO has adapted perfectly to the demands of the automobile and plant engineering industry.