Oracle DW and AS

I was just curious as to how prevalent Oracle Data Warehouse and App Server software usage was amongst this group. I also have some questions as to how DW and AS are managed/configured administered, since we just had a knockdown/dragout between the managers of reporting and database over roles and responsibilities.

My questions are:

1 - Who does/should control Application Server installation?

2 - Configuration?

3 - Administration?

4 - Maintenance?

5 - Who does/should control the change management process?

6 - Do most companies which have Data Warehousing rely on the DBA team for ETF function?

I realize these questions are rather broad. I would rather start a discussion than get a concrete answer for each. I am sure there are still many questions beyond these that should be asked.

As a traditional Oracle DBA, I find my skills are not where they should be (very little system admin and web development knowledge). Is this something that a DBA should be directing themselves to learn? Or is this a development/operational function?

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