Pareto Chart definition

A chart that incorporates both a line graph and a bar graph, commonly used in quality assurance to find areas that need attention. Individual values are represented in descending order in bar form, while the line is the cumulative sum of the individual values.  The chart is named after Italian economist and sociologist Vilfredo Federico Damaso Pareto

The Pareto chart is known as one of the Seven Basic Tools of Quality, a set of tools that help organisations troubleshoot and improve quality. The other six are check sheets, control charts, histograms, scatter diagrams, flow charts and ishikawa – often called fishbone – diagrams.

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