Ratan Tata transformed the Tata Group from an unwieldy collection of businesses into a more focused global conglomerate. When he became chairman in 1991, he faced resistance while implementing changes like setting a retirement age and making companies contribute profits to build the Tata brand. Under his leadership, the Tata Group launched new products, made strategic acquisitions, and grew revenues over 40 times and profits over 50 times. However, some of his bold risks like the Tata Nano car and entry into telecom did not succeed. After retiring in 2012, he briefly served as interim chairman again in 2016 during a leadership transition at the Tata Group.