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                        These Enterprise Data Models all follow a Design Pattern which has a Top-Level Model with separate Models for specific Subject Areas.	
			 Click here for a Data Architecture showing how an Enterprise Data Model can be created from a Canonical Data Model 
and Subject Area Models.
 We have three options when it comes to designing an Enterprise Data Model :-
 1) Top-down - starting with a 'Mission Statement'
 2) Bottom-up - starting with some original source documents, such as Bank Statements, Financial Reports, Invoices, Sales Receipts and so on
 3) 'Middle-out' - starting with a Life Cycle analysis for Customers, Events or Products  
  
Here's an interesting discussion on 
LinkedIn.
			  
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