This project timeline uses two different scatter chart series to display milestones above the timeline and tasks with durations below the timeline. The durations are created using X Error bars. The length of the leaderlines for the tasks can be defined by the user to show task dependencies.
The vertical positions of the tasks and milestones are adjusted by the user. This may work great for some timelines, but if you have more than 20 tasks to show, you may be better of using a Gantt chart.
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