The SU-30MKI is the first Russian aircraft designed in collaboration with Hindustan Aeronautics Limited and Defence Research and Development Organisation . It was produced only when the Indian Air Force decided to purchase the Sukhoi-30 MKI and include modifications according to its needs.
The introduction of the Su-30 into the IAF is a bit baffling for some. This is due to the fact that IAF has been operating Su-30s ever since 1997 which are not Su-30MKIs but Su-30MKs. However, since they are being operated by the Indian Air Force, they are referred to as Su-30MKIs by some expert in the aviation arena.