The document discusses upgrade paths and dependencies for various CA software products including Application Engine, Enterprise Event Manager, Workload Change Manager, System Agent, iXp, and iDash. It provides the latest versions that are supported on Windows 2012 and RedHat 6 and notes which products require in-place upgrades versus new installations. The document also provides tips for a successful upgrade including upgrading EEM and WCC first before switching over Application Engine and testing at each step.