The method includes processes of a power grid planner, {TAIL ~ power grid router}, power grid verifier, and {HEAD ~ global signal router} that are used iteratively to define and produce a power grid structure 
The method includes processes of a power grid planner , { TAIL ~ power grid router } , power grid verifier , and { HEAD ~ global signal router } that are used iteratively to define and produce a power grid structure
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH