[otrs] PROPER STANDARD procedure for upgrade

Hi all, is there a proper standard procedure how to upgrade/patch OTRS on different OS ? I'm using Fedora and OTRS 2.4.4 and I've browsed the lists all over and found million opinions on upgrade. It seems that there is no standard procedure at all... Some people even say that rpm -Uvh will do the job but I'm not sure - maybe I'm a bit doubtful because I've read so many opinions on this matter. So is there ANY proper standard procedure how to upgrade/update/patch OTRS from 2.4.4 to 2.4.7 on Fedora ? Thanks, Cheers