Drill Down Donut PRO is designed for exploring multi-level data in depth and across the level of interest.
Start with the overview and drill down into details with just a tap or click on a slice. Click/tap in the middle to return to previous level. Dynamic “Others” slice allows you to group smaller slices into one, which you can explore with a click/tap.
In this example, we are looking at sales data. With drill-down you can easily see how profits are grouped by industries, company revenue and size.
The Pie Chart is an “industry standard” for conveying the relationship of parts to the whole. You will use pie charts when you want to show how specific aspects – or slices – of your data contribute to the big picture. Pie Charts are easy to understand even by users who don't have a statistics background and therefore are preferred for showcasing data for public consumption.
The default behavior of the chart is to SUM up all the values from the lowest to the highest level based on the category which is at the top level.
Most commonly we see this visual used as an interactive filter for the whole report, since it is more intuitive and visually appealing than using a typical slicer visual.
Pie charts are seldom used for showing changes over time. It’s also not a common practice to use a pie chart if you need to compare data that is not summarized into a grand total.