Final answer:
A project development plan outlines the tasks, responsible individuals, timeline, and budget for a project, vital for its success and practical for managers to understand and implement.
Step-by-step explanation:
A document that shows how a project will be completed, including tasks, responsible parties, a timeline, and cost estimates is known as a project development plan. This plan plays a crucial role in the success of a project as it influences the detailed design process, which is essential to turning a good design concept into a successful end product. It is important for the plan to be thoroughly thought out and structured to make it straightforward for program managers to grasp the objectives and the processes, which contributes to the plan's usefulness and usability.
Lastly, the plan should be adaptable to changes while having a strong foundational framework to guide the project through its various phases such as the Preparatory Phase, Implementation and Learning Phase, Program Evaluation Phase, and the Development of Lessons Learned.