What are the best practices for splitting up Team Areas and Timelines in RQM?

Hi,

When you have multiple teams using the same RQM Project Area, what is the best way to split up the Timeline and Team Areas?  Should teams that have the same schedule share a Timeline and those on different schedules have their own Timeline?

For Team Areas, I assume we'd want different Team Areas if we want to restrict other teams from editing Test Artifacts from another team right?  If we also have separate Timelines is it required to have separate Team Areas since the Team Area is linked to a Timeline.

And at what point should we consider just having separate Project Areas rather than Team Areas.  The con is that we couldn't query between the 2 projects, but is that all?

Thanks,