For example, over time, wire harness manufacturers will figure out the optimal procedure for designing connector subassemblies. Advanced engineers can enter the steps of this process as standards, reusable rules and constraints for automation. As a first step, these rules may dictate that modules should be created for various groups of welded connections, converted to subassemblies. The next step might be to create modules for the connectors whose wires all belong to the same vehicle option, and then for the connectors with the fewest remaining wires. Finally, if the module contains all the wires in the associated harnesses, it must also contain the wraps and fasteners on those harnesses. With a digital simulation model of the harness, advanced harness engineering software such as Capital can do this by automatically applying these rules in seconds or minutes (depending on the size of the harness).