Indra nooyi, ceo and chairman of pepsico is considered the most powerful woman on fortune's 50 most powerful women's list, uses the strategy "performance with purpose" to guide pepsico. an example of a program consistent with their strategy is pepsico's "pepsi challenge" which provides consumers with the opportunity to come up with creative solutions that "refresh the world". in this situation, nooyi is an example of someone who uses: personal power social power legitimate power expert power

I think that Indra Nooyi is using social power because she involves the consumers in creating innovation. She makes a close interaction based on the feedback of the consumers. And as one community, consumers have also the right to propose solutions for continuous development. All the other choices do not conform to her Pepsi challenge. She does not use her personal power that may include her intimidating people because of her reputation. It could also not be legitimate power because there is no legal actions that are used. It also can't be expert power because she just asks for open ideas, and not offer to them her expertise of her field.