Milestone is a significant event in the project. The milestones show not duration but status change of the activity in a project. They establish an orientation in the project process. The milestones provide an overview about stages and intermediate objectives. Due to the current overview of the project state milestones provide an analysis or a consideration, whether the direction should be changed or how the next milestone can be achieved. The project manager can, therefore, monitor well all project phases and subprojects, and thus always has a project under control. The milestones are displayed either in the network or in the Gantt chart. The milestone trend analysis supervises the date delay of the milestone in the project.
The milestone can also be an intermediate objective as a condition for the start of another activities. The project management can also contain timing milestones or date milestones. Their duration is zero. They help not to overrun the planned costs or delivery times.