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sverhoeven
Frequent Visitor

Power BI modeling - multiple models versus single source of truth

Hi,

 

I'm having the following question regarding model design:

 

In typical organizations, you find that multiple areas exist, such as 'finance', 'hr', or 'production'. Since the advice from Microsoft is to keep models as small as possible (https://learn.microsoft.com/en-us/training/modules/design-model-power-bi/1-introduction), this would lead to the conclusion to split up the data for these business areas, and to offer split-up models for each of them. However, this seems to conflict with the goal of keeping a single source of truth (f.e. https://powerbi.microsoft.com/nl-nl/blog/cerner-corporation-the-importance-of-a-single-source-of-tru...), as this would cause duplication of Power Query Editor steps and duplications in definitions of DAX measures for tables that are part of more than 1 model.

 

How can these seemingly conflicting goals best be reconciled? Can we for example find a way to avoid duplication of steps and measures, thereby safeguarding the existence of a single source of truth?

 

Thanks.

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