Which of the following describes a quality control tool used to analyze defects based upon number of occurrences?

Pareto diagram A Pareto diagram is used to rank the importance of a problem based
on its frequency of occurrence over time. This diagram is based on the Pareto principle,
which is more commonly referred to as the 80/20 rule . The Pareto principle is named after
Vilfredo Pareto, an Italian sociologist and economist, who observed that 80 percent of the
wealth in Italy was held by 20 percent of the population. This principle has been applied to
many disciplines since Pareto fi rst discovered it. Applying the principle to Quality Control,
it says that the majority of the project defects are caused by a small set of problems. A
Pareto diagram helps isolate what the major problems are so that you can take the action
that will have the greatest impact. A bar graph is used to display problems in decreasing
order of occurrence so that priorities for improvement can be established.
The purpose of a Pareto diagram is twofold:
It displays the relative importance of the defects.
It directs the improvement efforts to those areas that will have the biggest impact.