I think capacity of Indians could be the best seen, when comparing with Iran. In contrary to Iran, which is 40 years under sanction, India have free Access to any technology in the east and the west. Iran start with small steps and start with reverse enginiring of spare parts and learning and developing technical inteligence. When they produce all spare parts for their SAMs, planes, etc, they start producing new ones, the same as original ones, like Hawk and Crotale. When they fully mastered original technology, they start to modernizing them to modern standard like Mersad, which is Hawk only visualy from outside, but inside is totally new, as missiles have ARH radars, complex have new PESA/AESA radars, digital electronics, etc. After that they start developing their own new SAM systems like Bavar-373 and Khordad-3, which prove itself with shoting down US Global Hawk. Iran is also producing domesticaly new Kowsar modernized multirole F-5E/F jets.
India on the other hand made their start very laudly with big steps andf take developing help from around the World and after long time, they produce nothing on their own. Let see, Arjun tank is Leopard 2 tank with Israeli FCS and they got under average tank. Tejas is fully foreign, engine is from US, radar and armament are from Israel, radome and ejection seat is from UK, avionics is from France,... India also claim codeveloping Barak-8, but it is fully Israeli SAM complex. Akash is fully Indian project of modernization of old SA-6 Kub. it seems it is a failure, as India went to buy NASAMS and in development of new Medium range SAM with Israel (Israel developing it).