Model Branch v. Exporting Package Hierarchy

[andrewd]

I am trying to understand the purpose of the Model Branch.  If I put a single package is put under version control, all sub packages are locked/unlocked when the top level package is locked/unlocked.  How is defining a model branch different?

[Eve]

The "branch", is every child package separately added to version control. It means that different people can be working on different parts of the overall package structure more easily.