Lohani, interacting with a group of mediapersons here, said OTP can't be the sole criterion to judge performance of an airline like Air India considering the complexity of its operations.
His comments come in the backdrop of a survey ranking Air India as the third worst performing airlines in the world. The government-owned airline has already challenged the findings of the survey.
"Once those (issues) are resolved, the OTP will also improve further," he said.
He said Air India operates nine types of aircraft and flies to over 100 destinations, including airports abroad, unlike other carriers who have sort of "shuttle service" operations.
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"In such a complex operation, an airline can't be judged simply on one parameter, OTP alone. There are other parameters like catering, occupancy and yield as well, (these) should also be taken into consideration."
The Air India Chief also said that he was "happy" with the prevailing mechanism for measuring airlines OTP at the four airports -- Delhi, Mumbai, Hyderabad and Bengaluru -- which is under review of the aviation regulator DGCA after the budget carrier IndiGo found fault with the system, particularly at the Mumbai airport, in the wake of its sharply declining on-time performance.