This chapter contains the following topics: 

• About Supported Upgrade Paths
• About Upgrade Environments
• About Midtier-Centric and Mainframe-Centric Development Environment Upgrades
• About the Upgrade Process
• About the Override File
• About the Database Server Configuration Utility
• About the Siebel Upgrade Wizard
• About the Repository Merge
• About the Siebel Database Server