SOSTAC Marketing Planning Model is an approach to marketing planning that provides a framework for marketers and business owners to develop and implement their marketing strategies. The SOSTAC model was created by Dr. G.S. Prakash in 2001, who was the former chairman of the Indian Institute of Management (IIM), Ahmedabad and currently, the Chairman Emeritus of IIM Bangalore. The SOSTAC model has been used by organizations such as PepsiCo, Microsoft, Google, IBM, Nestlé India Ltd., Tata Consultancy Services Ltd., Unilever India Ltd., Wipro Ltd., among others.