An ICT division needs to establish its own unique operating model. This may (and probably should) leverage input from best practice frameworks, but will have its own business context and bespoke details and integration aspects across plan-build-run and the internal and service provider ecosystem.
Just adopting a particular framework doesn’t necessarily enable value, especially if ‘adopting’ doesn’t include all of the people, process, partner/provider, technology, service-aggregation and governance elements of a holistic target state. (e.g. just purchasing a tool, or just sending people to training will not result in the required outcome).