Hi Ian,
Sure you can, I assume you want to evaluate earned value
or determine what if scenario's for your project. The
best way to accomplish any type of network analysis would
be changing your view to the Network Diagram view, and
play around with the data criteria in this view. In
addition, you will need to select the Pert Analysis Tool,
from the tool bar selection. You need to read and
understand how Project 2003 does the pert calculations.
Hope this helps