The manager of a supermarket would like to know which of several quality problems to address a tool that would be most helpful would be a Pareto chart.
A Pareto chart is a form of a graph with both bars and a line graph, where the bars reflect individual values in descending order and the line the cumulative total. The chart is called after the Pareto principle, which takes its name from renowned Italian economist Vilfredo Pareto.
The Pareto chart's goal is to draw attention to the most significant among a group of (usually several) components. Pareto charts can be used in quality control to identify the flaws that need to be fixed first in order to see the biggest overall improvement.
It frequently reflects the most frequent causes of faults, the most prevalent kind of defect, the most common causes of customer complaints, and so forth. For each bar in the Pareto chart, Wilkinson (2006) developed a method that generates statistically based acceptability limits (akin to confidence intervals).
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