The continuity of the organisation depends on the business applications. Changing or renewal of functionality, or data migration, falls under the mention Release Management conform ITIL.
Release Management ensures that only available authorised and tested software and hardware are used. With Time IT you make a consistent action plan for that purpose, which then carefully assures the quality of the work environment.
Below you can see how you create a Release Management action plan with Time IT for a functional upgrade.
Hereby an example of a Release Management plan in which a functional upgrade is made.