What is the name of the chart that combines a column chart and a line graph, illustrating the principle that 80% of effects come from 20% of causes?

The chart that combines a column chart and a line graph, illustrating the principle that 80% of effects come from 20% of causes, is known as a Pareto Chart. This chart is specifically designed to show the relative importance of various factors in a dataset by displaying bars for individual categories (the causes) and a cumulative line graph that represents the total impact of those categories.

The principle highlighted by the Pareto Chart, often referred to as the Pareto Principle or the 80/20 Rule, emphasizes that a small number of causes often lead to a large portion of the problems or effects. In practice, this makes it easier for organizations to prioritize their efforts on the most significant factors that will lead to meaningful improvements.

While line charts, scatter plots, and bar graphs serve different purposes in data visualization, they do not specifically illustrate the 80/20 relationship or combine features of both the column and line graph in the same way that the Pareto Chart does. Therefore, the Pareto Chart uniquely fulfills the need to analyze and prioritize opportunities for improvement based on this principle.