Definition
Phases represent distinct stages or periods in a project or process, each with its own objectives, activities, and deliverables. These sequential or iterative steps help break down complex work into manageable parts, guiding teams through a structured approach. Understanding and adhering to defined phases ensures that work progresses logically, milestones are met, and resources are allocated effectively. For instance, a software development project might move through phases like requirements gathering, design, implementation, testing, deployment, and maintenance. This contrasts with a continuous flow model, which lacks clearly delineated stages and focuses on constant iteration. Concepts of phases are fundamental across many IT certifications, including PMP, CAPM, and PMI-ACP, as well as in domains like project management and system development life cycles.