Why do we need customization?

Why are we customizing the reports? Why do we need customization.

NOTE : [I][This question was asked by banarasraj_yogi][/I]

Hi
We Customize reports based on the clients requirements for easy assesment of the important information.

e.g:- If you are buying an item, the unit cost of the item & no of items required are displayed in the report, where as if the total cost is not displayed then we add a new field to the report, where we call it customization
Hope you understand this.
Cheers
Sudheer

because client may not require some fields or wants to add some additional fields.and also want to have a change in functionality

Hi
We Customize report to view only the mandatory columns which explains the best logic and display the exact information.
Cheers
Sudheer

then wat does creating a synonym for a inbuilt mean? is it a Customisation?