When the Milestone condition is assigned to a milestone, you can associate the milestone with another milestone that has already been defined in PeopleSoft Contracts or PeopleSoft Projects. This enables you to define complex relationships along milestones. For example, a milestone Work Started with a milestone condition of Milestone is defined in PeopleSoft Projects. The milestone condition is met when the Project activity status is Open. The milestone application engine process will update the milestone condition status to Complete as well as the milestone status to Work Started.