The functional modules used to build the wiring harness often vary in size, and the routing paths can be complex and long. Therefore, organizing wire harness production around functional modules is not the best option. Wire harness manufacturers can address this by creating production modules using advanced wire harness engineering software to implement production modularity, design rule checking (DRC), value analysis and value engineering (VAVE) activities, and more. These production modules support efficient production without limiting flexibility and keeping a close eye on change management. Manufacturing software is used to support production modules, wire harness analysis, bill of processes (BOP), form sheet preparation and job instruction instructions for assembly operators, and more.