Feature modeling is a technique used in software engineering to represent and analyze the features of a system. It helps in understanding the relationships and dependencies between different features, allowing developers to visualize how they can be combined or configured. This approach is particularly useful in product line engineering, where multiple variations of a product share common features. In feature modeling, a diagram is often created to illustrate the features and their hierarchies. Each feature can have attributes, constraints, and relationships with other features, making it easier to manage complexity. Tools and methodologies, such as Feature-Oriented Software Development and Variability Management, support this process, enhancing collaboration among stakeholders.