given a managerial position in the Tata group. He achieved initial success by turning the subsidiary National Radio and Electronics (NELCO) around, only to see it collapse during an economic slowdown. In 1991, J. R. D. Tata stepped down as chairman of Tata Sons, naming him his successor. Initially, Tata faced stiff resistance from the heads of various subsidiaries, who had a large amount of operational freedom under the senior Tata's tenure. In response, Tata implemented a number of policies designed to consolidate power, including the implementation of a retirement age, having subsidiaries report directly to the group office, and requiring subsidiaries to contribute their profit to building the Tata group brand. Tata prioritised innovation and delegated many responsibilities to younger talent. Under his leadership, overlapping operations between subsidiaries were streamlined into company-wide operations, with the group exiting unrelated businesses to take on globalisation. During the 21 years Tata led the Tata Group, revenues grew over 40 times, and profit over 50 times. When he took over the company, sales overwhelmingly comprised commodity sales, but at the end of his tenure, the majority of sales came from brands. He had Tata Tea acquire Tetley, Tata Motors acquire Jaguar Land Rover, and Tata Steel acquire Corus. These acquisitions repositioned Tata from a largely India-centric group into a global business, with over 65% of revenues coming from operations and sales internationally. He also conceptualised and spearheaded the development of the Tata Nano car, which helped put cars at a price-point within reach of the average Indian consumer. Tata Motors has sinced rolled out the first batch of Tigor Electric Vehicles from its Sanand Plant in Gujarat, which Tata has described as "fast-forward[ing] India's electric dream." Upon turning 75, Ratan Tata resigned his executive powers in the Tata group on 28 December 2012. An ensuing leadership crisis over his succession drew intense media scrutiny. The board of directors and legal division of the company refused to appoint his successor, Cyrus Mistry, a relative of Tata and the son of Pallonji Mistry of the Shapoorji Pallonji Group, which was the largest individual shareholder of the Tata group. On 24 October 2016, Cyrus Mistry was removed as chairman of Tata Sons, and Ratan Tata was made interim chairman. A selection committee, which included Tata as a member, was formed to find a successor. On 12 January 2017, Natarajan Chandrasekaran was named as the chairman of