PMI Agile Certified Practitioner (ACP) Practice Exam 2025 - Free Agile Certified Practitioner Practice Questions and Study Guide

The Waterfall method is best described as a sequential method that is resistant to change. This traditional project management approach follows a linear progression where each phase must be completed before moving to the next. The typical phases include requirements gathering, design, implementation, testing, and maintenance. Once a phase is completed, going back to make changes becomes complex and often not officially supported. This rigidity means that adapting to new information or changing requirements can be challenging, thus making it resistant to change.

The structure of the Waterfall method also emphasizes thorough planning and documentation upfront, which contrasts with approaches that are more iterative and flexible, such as Agile. This solid framework can be suitable for projects with well-defined requirements where changes are unlikely to occur. In contrast, Agile methodologies focus on embracing change through iterative processes, ongoing customer feedback, and adaptability, which fundamentally differs from the Waterfall approach.