In addition to project activities, which consume time and effort, project schedules also have milestones—moments in time having no duration used to synchronize project work and to mark significant transitions in the project. Uses for milestones include:
Completion of related parallel activities
Phase gates or life-cycle stage transitions
Significant decisions, approvals, or events
Interfaces between multiple dependent projects
Other external activity dependencies and deliverables
List all project milestones.