Project Version Keys
The name of a project version or its "key" depends upon how the project version is created:
Status-dependent project version
You define the key for each status in Customizing. This means that the key is identical for all project versions triggered by the same status. You cannot change this key.
Time-dependent project version
The key you assign to each project version must be unique. You cannot change this key. However, by assigning the same key to a project version of a related project object, you can expand an existing and related project version.
You create a project version of a WBS element and give it the key V1. If you create a project version for a network which is assigned to this WBS element and give it the same key, V1, the system will add the network project version to the existing WBS element version V1.
Version Groups
When you create a project version in the information system, you must assign it to a version group. You can combine the various project versions by assigning them to the same version group. You may want to organize them according to project, or user, for example.
The version group is helpful when you use F4 to locate project versions because you can limit the selection to those versions that are assigned to the version group you entered.