1. An apparatus for developing a wiring design for a complex system, the apparatus comprising: a central processing unit (CPU) capable of creating a master wire harness network (MWHN) within pathway space reservations of a pathway space-reservation network of a complex system, wherein the MWHN comprises a model of possible wiring pathways between equipment of the complex system, wherein the MWHN includes wire harness elements interconnecting termination device elements, wherein the CPU is capable of importing a subsystems definition, the subsystems definition being represented by interconnections between the equipment, and wherein the CPU is capable of creating one or more logical net harnesses (LNHs) based upon the MWHN and the subsystems definition, the LNH comprising a collection of interconnections routed within the MWHN.