I would like to schedule equipment purchase, arrival, and installation as 3 separate tasks and then have them move together dependent on the purchase date. On the timeline I would like to see the date purchased, expected date of receipt, and date range of installation. So if we purchase the equipment later than the date defined, both the arrival and the installation dates will delay the same amount of time as the purchase date.

This cant be achieved just by linking the 3 tasks together so if the 1st moves the successors will push an equal duration?

You would think so but I think there is something wrong with my formatting. when I change the finish date, it will move the other dates so somewhere I must have things set that way. Also, when it shifts the tasks, it doesn't shift them in with the same date spacing. Some tasks get moved way up.

I am taking over another PM's project file so I am trying to fix this file rather than create a new one from scratch. Large Project.

Thank you for the reply.

Ok, if the start dates is actualized as indeed started and you are only updating the finish date, and your successors are linked finish to start they should indeed move the same duration as the driving predecessors 'push', this is assuming you are accounting for the work days on your assigned calendar. Of course days will be added to your successors to account for weekends if you are using a 5 day calendar.