A.3.1 Welcome
The Upgrade Assistant Readiness Check performs a read-only, pre-upgrade review of your existing Oracle Fusion Middleware schemas and Oracle WebLogic component configurations.
The Readiness Check provides a formatted, time-stamped Readiness Report so you can address any issues before you attempt the actual upgrade. If no issues are detected, you can begin the upgrade process.
The Upgrade Assistant Readiness Check can be run with your existing 11g or 12c domain online or offline.
Note:
While readiness check ships with 12.2.1, it only checks supported pre-upgrade environments.The Readiness Check can be run any number of times before the actual upgrade is performed. However, do not run after the Readiness Check after an upgrade has been performed, as the report will not provide valid results.
Oracle recommends that you read this report thoroughly before performing an upgrade.