This document discusses Porter's Five Forces model and its application to AirAsia. It analyzes the competitive forces in the airline industry as it pertains to AirAsia, including rivalry among existing competitors being high due to competitors offering similar low cost services, the threat of substitutes like buses and trains being moderate, the power of buyers being high due to AirAsia's competitive prices and services, the power of suppliers being moderate as AirAsia and other airlines rely on the same suppliers, and the threat of new entrants being moderate due to significant capital requirements and government regulations controlling routes. The document also summarizes some of AirAsia's key activities in its value chain like online ticket booking and using technology to reduce costs.