The airport expansion was planned in two phases, with the first phase to expand the airport to a capacity of nine million passengers a year, and the second phase to expand to a capacity of 12 million passengers a year. However, the forecast traffic volume growth and type of traffic forecasted to use the airport proved to be too conservative. The airport was starting to be used as a hub, thus seeing larger wide-body aircrafts coming in which were not considered in the original design. These developments in the traffic profile required the addition of gates and improvements to make the gates suitable for heavy jets.