This document provides an overview of Porter's Five Forces model for industry and competition analysis. It explains the objectives of the model, which are to identify the factors that shape industry competition and assess the long-term attractiveness of an industry. The model examines five competitive forces: the threat of new entrants, the bargaining power of suppliers and buyers, the threat of substitute products, and the intensity of competitive rivalry. The document provides guidance on using the model, including a table to calculate the degree of power within each force. It also includes a case study applying the model to analyze competition in the industry of Apple Inc.