Mr Hasan
It might be out of this course topic.But will there be a course for upgrading 11i to R12?

Sorry liben, the focus of this website is to make you a functional consultant (with some necessary technical knowledge off course). Upgrade is strictly done by DBAs.

Hasan, I no dot agree with you on this, in part! Functional Consultants have a part to play in any Upgrades. So please, tell us what upgrades entail for Oracle Financials Functional Consultants.
In fact, during an Upgrade of Oracle Applications 11i to R12 involving Oracle Financial modules, DBAs will not be the one dealing with the setup of the financial modules. It is Oracle Financials Functional Consultant. Oracle Applications Technical Consultants be be involved for RICEW (reports, Interfaces, Conversion, Extensions and Workflow).
DBAs will install the software, do some database and applications configuration, patches etc...

You are right Gavrobere, in saying that functional consultants have a part. That part is performed in "impact analysis" project. Before the upgrade some companies (most large companies) conduct impact analysis project. This project usually goes on from 2 to 5 months. For example just recently Deloite did 2 months analysis for Rogers Canada. Main deliverables include a document listing impacts the upgrade would have on end users and business processes. Based on that green light is given to the next "upgrade project".

As far as the actual upgrade is concerned it is mainly carried by DBAs. Functional guys are on alert and come into play for testing the configuration and functionality in the test environment. Upgrading from 11i to 12 and reimplementing R12 are two different things. Former calls for impact analysis as most of the setup will be automatically upgraded, while the later calls for requirement gathering as this is a fresh implementation and you would like to restart from scratch. I thought the original question was about how to perform the upgrade. That would be covered under DBA training not functional training. These are my 2 cents.

Thank you Hasan.
1) But how would one find out (know the list) about the impacts the upgrade from 11i to R12 would have on the various modules, before the actual upgrade is performed? Is there any guiding material for this? Or, just knowing "What's New" in the release 12?
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2) I hope you distinguish an Implementation from a Re-Implementation. If so, then please, tell us what could bring about a Re-Implementation scenario. Would it be because of a failed implementation?

1) One would educate himself with "delta".
Metalink has tons of documentations on the new features.
Oracle's official documentation is also helpful.
Google is replete with articles on new functionality.
Finally when you play around with new release and compare it with
the older version.
2)
Fresh implementation of Oracle ERP is where the company was previously using non-Oracle ERP or no ERP at all.
...
Suppose a company is using 11i and they want to go to R12. They debated between upgrading from 11i to R12
or re-implementing R12 and then migrating data over from 11i to the
new R12 system. You can consider re-implementing as a fresh implementation as well where the legacy system is an older version
of the same software. I used term re-implementation in this context.