Milestone
Plan items are composed of a series of milestones, which represent critical points of execution. All plan items have start and end milestones, and might have zero to many intermediate milestones. This is shown in the following diagram:
In this example, plan item EP_B1 has only start and end milestones. This represents the basic set of milestones that all plan items contain. Plan item EP_B2 has start milestone, end milestone, and two intermediate milestones MILE1 and MILE2.
Milestones represent the critical points during execution of a plan item and represent the points where Orchestrator can control execution of the plan item. Milestones are points where dependencies might be attached to a plan item. Dependencies might be attached only to start and intermediate milestones and might not be attached to any other point on a plan item.