The main challenge arises from the difficulty in comparing the areas of the segments within the chart.
Consequently, pie charts and similar graphs become challenging to interpret.
Colors for categories don’t make it easy either since the brain tries to figure out how the color relates to the category, which in the example here just happens to be a random choice.
Let’s see if the Treemap helps and make it easier.
Rita notes that treemaps work well in a specific niche: hierarchical, categorical data. But within their niche, they work really well, which is more than you can say about pie charts…