Those are excellent examples of the evil pie charts do. The one which i've hit most often in the world of tech company business reports is the nefarious two pi

Those are excellent examples of the evil pie charts do. The one which i've hit most often in the world of tech company business reports is the nefarious two pie chart comparison. The very first question one should ask in that case is if the absolute aggregate (sum) is provably the same from chart A to chart B. In one notable case we finally learned that the total amounts had tripled between the two, and corresponding pie slices which had all but disappeared from A to B actually reflected quantitative growth.