 In its annual report for 2010–11, The Comptroller and Auditor General of India noted that had been spent on development, with only two out of the six milestones prescribed having been met.Among its deficiencies, CAG says the engine weight was higher than the design specifications, being against , and there was no progress on developing the compressor, turbine and engine control systems.On 21 December 2011, "9 prototypes of Kaveri engines and 4 prototypes of Kabini (Core) engines have been developed" told by the then Defence Minister AK Antony in Rajya Sabha.