Which of the following tools is based on the 80-20 principle?

Histograms show the distribution of a single variable over time or across a range but do not inherently apply the 80-20 principle to prioritize causes.

A Pareto chart is a specific type of bar chart that shows the frequency of problems or causes in descending order, along with a cumulative percentage line, making it ideal for identifying the "vital few" causes (the 20%) that contribute to the "trivial many" effects (the 80%). This directly applies the 80-20 principle to prioritize problem-solving efforts.

Run charts display data points in the order in which they occur over time to identify trends or shifts, but they are not directly based on the 80-20 principle.

An Ishikawa diagram, also known as a fishbone diagram or cause-and-effect diagram, helps identify potential causes of a problem but does not inherently use the 80-20 rule for prioritization.