The Importance of Defining the Context of Your Design

If you don't define your boundaries and the context that everyone has seen different things through, ultimately what you're going to get is an order object that some of the fields are for this business unit. And domain-driven design would maybe say that that's a red flag that you haven't bounded the context well. So it's usually like shipment and invoicing that all touch, order, and customer to some degree - but not in tax rates.