Power BI Technical Article: Data Modelling, Relationships & Joins

Power BI converts raw data into dashboards, but report quality depends on prior data preparation. Data modelling organizes tables, columns, and relationships to define how data parts connect. A correct model improves report performance, simplifies DAX calculations, reduces redundancy, and enhances scalability. Conversely, poor organization leads to inaccurate calculations and misleading reports. Because a dashboard is only as reliable as its underlying model, data modelling is as essential as visualization for creating successful business intelligence solutions.