Aircraft Electrical Wiring Interconnect Systems (EWIS) regulatory requirements are stringent and can be expensive to fulfill. Specifications encompass harness naming conventions, physical wire spacing, and much more. While manual design approaches have long sufficed, increasing complexity is driving an industry-wide move to automated design solutions. By applying rules and constraints, commercial off-the-shelf tools can help designers manage complex system designs while simultaneously building databases for compliance, manufacturing, and maintenance documentation.