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Have One Data Model per Business Area

James McGillivray offers us an important piece of advice:

I cannot stress this enough. If people are consuming your data in multiple places, the data needs to come from the same data model. That can be an Enterprise Data Warehouse, a Data Mart, a Power BI Model, or any other data source, but at some point you need to be able to track the data back to a single place. If you don’t do this, you will spend THE REST OF YOUR DAYS explaining the differences between the data models to business and customers, and reconciling the differences over and over again.

Read on to learn why this is so important.