Snapshot of testplan, test cases and execution test results

Hi,

Which is your recommendation to be able to create a snapshot of a
particular release and be able to restore all the history about it
(including test plans, test cases with associated requirements, and test
execution results)?

I have been working with snapshots's feature available in RQM, but only
test plans and test cases information is stored. The execution test
results can not be stored as part of the snapshot and I cannot have
access later to the complete information about how the tests of a
particular release were completed.

I have seen similar concepts in RQM related with release in RQM but I
really don't know the relationship between them: snapshot, release,
milestone...

Do you have any recommendation about the process I should follow in RQM?

Thanks,

Ana