Hi Javier,
Welcome to this Microsoft Project newsgroup
Well....Project allows the entry. However you have to be aware that such a
constraint does not mean that the tasks will finish no later than, just that
that is what you want the schedule to do. I would continue to use As soon
as possible as this will give you the greatest flexibility, as any other
constraint will cause a reduction in flexibility. Instead, I would use a
Deadline date as an aiming point. If the plan schedule indicates a later
finish than that, then an indicator will show in the Indicators column,
whence you will have to revise your schedule to meet the deadline.
FAQs, companion products and other useful Project information can be seen at
this web address:
http://project.mvps.org/faqs.htm
Hope this helps - please let us know how you get on
Mike Glen
MS Project MVP
See
http://tinyurl.com/2xbhc for my free Project Tutorials