Chapter 3 focuses on feasibility analysis, which assesses the viability of a business idea through various analyses, including product/service, industry/market, organizational, and financial feasibility. It emphasizes the importance of conducting these analyses early to avoid spending resources on impractical ideas and provides guidelines on how to assess each type effectively. A feasibility analysis template, referred to as 'first screen,' is introduced as a preliminary tool to gauge the potential of a business idea.