This is done for 3 tier applications (developed for Internet / intranet / xtranet).
Here we will be having Browser, web server and DB server.
The DB server would be having oracle, sql server, sybase, mysql etc. (All data is stored in the database available on the DB server)
If an organisation wants to go for an automated testing
basically for Functional testing by using QTP. then at what
stage they should proceed for Automation testion. However a
vast experience is there in the field of manual testing.