Inputs: projects, people, constraints, rates and dates
Outputs: project schedules, task tracking, project budgets, status reports, notifications, etc, etc.....
You should really do some reading up on the software if you want your question answered. Gary Chefetz and Dale Howard, frequent posters to this newsgroup, have authored several books that are excellent reads on the topic of project management with project server software.
Earl
what are key inputs and outputs of the software
