This document discusses the importance of a viable business model in corporate strategy, emphasizing its four core components: customer value proposition, profit formula, key resources, and key processes. It outlines circumstances that necessitate business model innovation, including disruptive innovation, new technology, and unmet needs, while also addressing potential institutional barriers to change. The author, David Tang, concludes by highlighting the necessity for patience in modifying business models, as successful companies often revise theirs multiple times to achieve profitability.