Forum Discussion
Why Increasing Task Resource Units Project Doesn't Reduce Task Duration
Well, you don't want a "fixed units" task because you are changing the units. What you really want is a fixed work type task that by default is "effort driven". So increasing the assignment units will, by default, reduce the duration.
Regardless of which task type you have, when you make a change to one of the three variables in Project's scheduling equation, duration, work, or units, a small triangle, (yeah, this one you can readily see), will appear in the upper left corner of the field you are changing. Along with the little triangle you should see an option selector immediately to the left of the field which will allow you to better define your intent.
You may also find it very useful to click on the column heading for the Type field and then hit the F1 key. That will bring up the help file for that field.
John