In quality control applications, bar charts are used to identify the most important causes of problems. when the bars are arranged in descending order of height from left to right with the most frequently occurring cause appearing first, the bar chart is called a

Pareto diagram

Explanation:

Pareto diagram is a kind of chart which contains both the bars and the line graph, where the individual values are presented in the descending order by the bars, and cumulative total is presented by line.  

The line in the Pareto chart represents integral along horizontal axis of piece-wise continuous function which is represented by sequence of bars.

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