I only have the final date

[MRV]

I have a project with 1200 lines with diferents task and specific duration,
my problem is that I don't have the start date y only have the final date
(deadline).

I made a test working with predecessors task and "Start to Finish" this
working fine, but I need to change 1,200 lines, exist something more
automatic to recalculate the all project task from the end date ??

 

[Steve House [MVP]]

As project manager it's going to be up to you to determine the project start
date.

Set your links to the default FS and in the Project Information dialog set
it to schedule backwards from project finish. Note that using the results
of this as your project schedule is an incredibly bad idea but at this stage
it is a logical first step for you. This will tell you the latest possible
date you could start the project and have a hope of finishing it on time IF
everything went off perfectly, which of course it never does. Now pick a
kickoff date well in advance of the calculated start date to give yourself
some wiggle room and switch to calculate the schedule from the start date
forward. Set your required finish date as the Deadline entry on your finish
milestone so you'll get a red-flag warning if schedule changes cause you to
miss your required end date so you can do something to fix it.