Mahadeo, it is necessary if you wish to create reports out of the archived data, if you used the ADK properly, the framework is provided in its entirety to read-write-delete-retrieve archived data.
Since you mention your customer wishes to see the archived data in ALV, you will soon learn that compressed files (created by the Archiving ABAP framework) are not plain text files that can be easily handled using DATASETs..
At this point i strongly recommend you read more information about the ADK and how archiving works.