What is dimensional modeling? Why is it needed for Power BI? Are there benefits to using dimensional modeling with Power BI? Yes, dimensional modeling is best for modeling in Power BI. The terms most frequently used to describe dimensional modeling is star schema or facts and dimensions. Even though the Kimball Group has ‘retired’, the methodology spelled out by this group still works great in today’s business intelligence reporting. Facts are for the measures with surrogate keys to related dimensions. The dimensions are the place for de-normalized attributes for slicing and dicing data. There won’t be any cons listed during this session, only the benefits like performance improvements and simplicity as we roll through the demos.