There are two ways to implement the ETO (used to named EPM) - with or without the Job Cost. I am not familiar with Job Cost but as I know that is most financial consultants do not like to touch.
If there is no JC involved, ETO means the following to me:
1. The kind of platform to bundle all SO/PO/WO under what you named "Project".
2. With little and limited functions like MS Project does for phases linkage (I mean scheduling of forward or backward)
3. It integrated with SO quote process to do the job but not really helpful to me.
4. It integrated the planning functions (PRP) which you can do most planning jobs but only focus on "project related" materials.
Suggested to think about E8.10 instead of E8.9 if you do like to use ETO. And do not know why, the GUI of ETO is not user friendly as the other modules and you have to take time get to used to it.
John Hsiao, E8.10