Optimal Design is pre-fabrication simulation software. The best power simulation software for integrated circuits in the industry today gives results that are unreliable (about +/-30 percent off from HSPICE simulators). This is mainly because currently available power simulation software is 100,000-1,000,000 times slower than HSPICE. Optimal Design simulation software employs underlying technology similar to HSPICE, but is up to 10,000 times faster than HSPICE while providing the same level of accuracy as HSPICE. Optimal Design enables chip designers and manufacturers to do what they've never been able to do effectively until now: modify their semiconductor designs in pre-production in ways that maximize performance potential and or efficiency of energy use required by the chip.