A project plan serves as a foundational roadmap that defines how a project is executed, monitored, and controlled from inception to completion. Its primary purpose is to establish clear objectives, outline detailed task dependencies, allocate available resources efficiently, set realistic delivery timelines, and define budgetary constraints. Furthermore, it acts as a crucial communication instrument that aligns stakeholder expectations, mitigates potential risks, and provides a measurable baseline to track ongoing progress and evaluate overall project success.