Version models
You can version models, for example, to use them in Release Cycle Management (RCM).
Prerequisite
The database used is a versionable database.
You have the Version access privilege.
Click
Application launcher > 
Models and objects.Navigate to the database group containing the models you want to version. When you select the group, its contents are displayed in the details view.
Move the mouse pointer over the row of the relevant model and click
More > 
Versioning.To version multiple models in one step, enable the check boxes of the relevant models and click
Versioning above the details view. The Enter description dialog opens.Enter a change description, to inform users about the changes compared to the last version. The description is added to the change list.
To include descriptive assignments such as a model of type Function allocation diagram (FAD), enable Include descriptive assignments.
Under Refined assignment, select how refined assignments should be considered:
No refinement: Refined assignments are not included.
Include complete hierarchy: All refined assignments are included.
Include refinement levels: Enter the level up to which the refinement assignments are to be included.
Click OK.
The models are saved as versions and a change list including the description is created. You can compare the model versions.