Different project management approaches are designed to suit different project sizes and complexities, much like different tools are designed to perform different tasks. Some methodologies are better suited for projects with clearly defined steps and minimal changes. Other methodologies are built to handle projects that undergo frequent changes and require high flexibility. The Waterfall methodology, for example, is often used for projects where changes are unlikely or costly, making it effective for industries like construction and manufacturing. Meanwhile, Agile project management offers an iterative, flexible approach that suits industries like software development that require adaptability and fast-paced work.