ITIL v3 had a general concept of "good practices" but no codified rules.
ITIL v4 does not make v3 "wrong." It makes it obsolete as a standalone model . The best practice today is to take ITIL v4's Service Value System, mix in your working v3 processes, and add Agile/DevOps where needed. itil v3 vs v4
Upgrading to ITIL V4 offers several benefits, including: ITIL v3 had a general concept of "good
In v4, you can blend "Change Enablement" (the new name for Change Management) with "DevOps" practices. V3 did not allow that easily. mix in your working v3 processes
Enter (2019), which fundamentally rethinks how IT delivers value. This isn’t just an update; it’s a philosophical overhaul.