I don't understand your meaning. Can you provide more detail and clarify your goal?
For Example: I have a workbook1 that is in the Project1,Project2 and Project3.
If I want to modify workbook1 I must do in the all Project(Project1,Project2,Project3).
How It optimize ? I would to modify workbook1 in Project1 and it synchronize workbook in Project2 and Project3.