I refer to the pie charts and their "offset" (doughnut charts) as circular charts because both types are virtually the same from the technical point of view and are used in very similar ways.
This chart type is frequently used and well appreciated, which is not always appropriate because of its limited options. There are some basic deficits that should prompt you to carefully check whether the use of a pie chart is appropriate. You must consider the following:
Such a chart doesn’t have any axes, and consequently no axis labels. The provision of additional information is therefore limited to the legend, data point labels, and inserted text boxes.
The number of clearly presentable segments is limited by two aspects: too many and too ...