Integration

How do you divide responsibilities when administering this product.

is it best to divide responsibilities by components?

is it best to divide responsibilities by function
example installation, performance monitoring ..

We are having a hard time dividing responsibilities.
Example -
if we divide it by components, and have a overall 9ias administrator , a portal administrator, a discoverer administrator.
If there is performance problem in the portal, the portal administrator needs to know not only how to administer the portal functions, but also need to know oc4j, mod_plsql and the database.


if we divide it by function, once person should know both ias and the portal..

Any pointers?