If you are new to Data Models, this page of my new Tutorial will help you understand the Data Model.
We might also design a Data Warehouse which is very useful for providng data for Reports and Business Intelligence.
If you are planning a Cloud-based Strategy, I recommend you start by thinking about the common Reference data, such as Product codes.
Put that in the Clouds to make it easily accessible from any branch.
Then plan to produce a 'Single View of the Truth', such as data which is in many Branches but is stored differently.
Click here to see an example of this for Retail shops.
Here are some interesting Architecture diagrams found by Googling "Cloud Architecture"
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