PERT, or Program Evaluation and Review Technique, is a project management tool used to plan and coordinate large projects. It helps in identifying the tasks required to complete a project, estimating the time needed for each task, and determining the overall project timeline. By visualizing the project as a network of tasks, PERT allows managers to see dependencies and prioritize activities effectively. Developed in the 1950s for the U.S. Navy, PERT is particularly useful for projects with uncertain activity durations. It employs three time estimates for each task: optimistic, pessimistic, and most likely, which helps in calculating the expected time and assessing potential risks. This technique enhances decision-making and resource allocation throughout the project lifecycle.