Modular design is a design approach that involves creating systems or products using a set of standardized components or modules that can be easily connected or interchanged. This approach allows for greater flexibility, customization, and scalability in design and manufacturing processes. Modular design is commonly used in various industries, such as software development, automotive manufacturing, and furniture design. By breaking down complex systems into smaller, interchangeable parts, modular design enables faster prototyping, easier maintenance, and reduced costs in product development.