After completing a schedule, the P6 Activity IDs are usually not in order from top to bottom. To make it simpler to find activities when checking the relationships it is useful to renumber the task from top to bottom. Unfortunately, the P6 Renumbering function will not renumber all project activities in the order on the screen and one method of renumbering activities from top to bottom is to export the schedule to Excel renumber and import the new Activity IDs.

If you wish to learn how to renumber a P6 schedule from top to bottom in Excel then please read this article I have written by clicking on this link>>>.