About the Siebel Incremental Repository Merge
If you are upgrading from Siebel CRM version 8.1.1.x (SIA repository) to the latest Siebel CRM monthly update, you perform an incremental merge of the Siebel database. Performing an incremental repository merge is required if you intend to use the new features included in the latest Siebel CRM monthly update.
The process of performing an incremental repository merge is described in detail in Siebel Database Upgrade Guide. This chapter describes tasks that are specific to the z/OS platform. Where necessary, you are directed to Siebel Database Upgrade Guide for information on tasks that are common to all database platforms.