Even the IAF is worried that it requires new aircraft as fast as possible to replace the ageing fleet while it may take 20 to 25 years for the private sector to reach maturity in an otherwise risky industry. These insiders said the private sector should better start by becoming tier-1, tier-2 and tier-3 suppliers of big players like Airbus and Boeing. They should first establish skills, processes, quality, human resource and management capabilities. The HAL executives said only they have the unique experience in terms of prototype flight testing. The PSU has also produced SU30, Hawk, Tejas and many helicopters to defend the borders.