Optimization involves monitoring and improving the performance of the radio network. It starts with the last phase of radio network planning. A cellular network covers a large area and provides capacity to many people, so there are lots of parameters involved that are variable have to be continuously monitored and corrected. Apart from this, the network is always growing through increasing subscriber numbers and increases in traffic. This means optimization process should be on-going, to increase the efficiency of the network leading to revenue generation from the network.