Decomposition Tree is a Power BI visual that allows data analysis according to multiple reporting dimensions. You can view it as a sophisticated drill down tool. It performs data aggregation and gives the possibility of drilldown according to the given dimensions, and it also contains elements of artificial intelligence that help in the analysis and indicate the solution.
Although Power Pivot reports still have advantages over the Matrix visual, in charge of displaying a table with a high level of detail, Microsoft persuades us day after day that Power BI will be able to carry this field as well as its “older brother”. The following text discusses the drill-down techniques used in Matrix visual and how to apply them to the selected detail, and are available since November 2018.
Drilldown is a term that describes obtaining additional details of a report based on the selected reporting dimension. If you are an experienced Pivot table user you are most certainly aware of the technique. This operation can be also carried out over reports created within PowerBI Desktop environment. In text that follows, I will show you how to perform drilldown.