Power calculation and planning before any signal routing in the VLSI chip physical design is very important. As Power supply rails carry large transient currents which may distort the signal lines using electrostatic discharge if design rules are not met correctly. Introduction to power planning A VLSI chip in the semiconductor industry is intended to perform a specific operation and has to communicate with the outside world through various signals. To have this signal flow to the chip and out of the chip we need a power supply. Hence proper power planning became an essential part of the planning process in the back-end of the VLSI chip design. An appropriate power supply network must be constructed by considering many aspects such as design