Gürcan ORHAN presented steps for migrating from Oracle Warehouse Builder (OWB) to Oracle Data Integrator (ODI). He discussed preparing the environment, running the migration utility, and reviewing reports. Special cases during migration include mappings with multiple connections to the same operator or tables with multiple primary keys. If full migration is not possible, remaining OWB mappings can be called from ODI packages using the OdiStartOwbJob tool. The migration should be planned and executed incrementally in work packages.