actvity links

[MLS112]

I need to link an activity to two another activities where this activity start when ever any of the other two finished first .
please inform me if there is any ay to do such link..
thanks

 

[Geoplan]

OK let's say activity 003 is the one you want to start when either activity 001 or 002 are depending on which one finishes first.
Set 001 and 002 as successors of 003 with type SF (start to finish). Then set activity 003 to have a Zero Total float" Constraint - I think this should do the trick.