SAM Pro Contract and Entitlement Strategy

[BradP-InnoSolv]

There are different ways contracts and entitlements are being created in the system by different companies.  I created this diagram to show (my understanding of) how the relationships are to be formed between contracts and entitlements.  I would like to get some input from experts if you see any issue with this baseline model or if there are any additional considerations that should be added.  This is not to necessarily cover all complex situations but be a baseline to use for better understanding. 

Thank you in advance.