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A Pareto chart is a special type of bar chart where the values being plotted are arranged in descending order. The graph is accompanied by a line graph which shows the cumulative totals of each category, left to right. The chart is named after Vilfredo Pareto
Vilfredo Pareto

Vilfredo Federico Damaso Pareto , born Wilfried Fritz Pareto, was an Italy industrialist, sociologist, economist, and philosopher, who developed a somewhat jaundiced view of the human enterprise....
, and its use in quality assurance
Quality Assurance

Quality assurance, or QA for short, refers to planned and systematic production processes that provide confidence in a product's suitability for its intended purpose....
 was popularized by Joseph M. Juran
Joseph M. Juran

Joseph Moses Juran was a 20th century management consultant who is principally remembered as an evangelist for quality and quality management, writing several influential books on those subjects....
 and Kaoru Ishikawa
Kaoru Ishikawa

Kaoru Ishikawa was a Japanese University professor and influential quality management innovator best known in North America for the Ishikawa diagram or cause and effect diagram that are used in the analysis of industrial process....
.

The Pareto chart is one of the seven basic tools of quality control, which include the histogram
Histogram

In statistics, a histogram is a graphical display of tabulated frequency , shown as bars. It shows what proportion of cases fall into each of several Categorization....
, Pareto chart, check sheet
Check sheet

The check sheet is a simple document that is used for collecting data in real-time and at the location where the data is generated. The document is typically a blank form that is designed for the quick, easy, and efficient recording of the desired information, which can be either quantitative or qualitative....
, control chart
Control chart

The control chart, also known as the Shewhart chart or process-behaviour chart, in statistical process control is a tool used to determine whether a manufacturing or business Process is in a state of statistical control or not....
, cause-and-effect diagram
Ishikawa diagram

The Ishikawa diagram are diagrams, that shows the causes of a certain event. A common use of the Ishikawa diagram is in product design, to identify potential factors causing an overall effect....
, flowchart
Flowchart

A flowchart is common type of chart, that represents an algorithm or Process , showing the steps as boxes of various kinds, and their order by connecting these with arrows....
, and scatter diagram.






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Pareto
A Pareto chart is a special type of bar chart where the values being plotted are arranged in descending order. The graph is accompanied by a line graph which shows the cumulative totals of each category, left to right. The chart is named after Vilfredo Pareto
Vilfredo Pareto

Vilfredo Federico Damaso Pareto , born Wilfried Fritz Pareto, was an Italy industrialist, sociologist, economist, and philosopher, who developed a somewhat jaundiced view of the human enterprise....
, and its use in quality assurance
Quality Assurance

Quality assurance, or QA for short, refers to planned and systematic production processes that provide confidence in a product's suitability for its intended purpose....
 was popularized by Joseph M. Juran
Joseph M. Juran

Joseph Moses Juran was a 20th century management consultant who is principally remembered as an evangelist for quality and quality management, writing several influential books on those subjects....
 and Kaoru Ishikawa
Kaoru Ishikawa

Kaoru Ishikawa was a Japanese University professor and influential quality management innovator best known in North America for the Ishikawa diagram or cause and effect diagram that are used in the analysis of industrial process....
.

The Pareto chart is one of the seven basic tools of quality control, which include the histogram
Histogram

In statistics, a histogram is a graphical display of tabulated frequency , shown as bars. It shows what proportion of cases fall into each of several Categorization....
, Pareto chart, check sheet
Check sheet

The check sheet is a simple document that is used for collecting data in real-time and at the location where the data is generated. The document is typically a blank form that is designed for the quick, easy, and efficient recording of the desired information, which can be either quantitative or qualitative....
, control chart
Control chart

The control chart, also known as the Shewhart chart or process-behaviour chart, in statistical process control is a tool used to determine whether a manufacturing or business Process is in a state of statistical control or not....
, cause-and-effect diagram
Ishikawa diagram

The Ishikawa diagram are diagrams, that shows the causes of a certain event. A common use of the Ishikawa diagram is in product design, to identify potential factors causing an overall effect....
, flowchart
Flowchart

A flowchart is common type of chart, that represents an algorithm or Process , showing the steps as boxes of various kinds, and their order by connecting these with arrows....
, and scatter diagram. These charts can be generated in Microsoft Office
Microsoft Office

Microsoft Office is a popular set of interrelated desktop applications, servers and services. Microsoft Office is collectively referred to as an office suite, for the Microsoft Windows and Mac OS X operating systems....
 or OpenOffice as well as many free software tools found online.

Typically on the left vertical axis is frequency of occurrence, but it can alternatively represent cost or other important unit of measure. The right vertical axis is the cumulative percentage of the total number of occurrences, total cost, or total of the particular unit of measure. The purpose is to highlight the most important among a (typically large) set of factors. In quality control
Quality control

In engineering and manufacturing, quality control and quality engineering are used in developing systems to ensure product s or Service are designed and produced to meet or exceed customer requirements....
, the Pareto chart often represents the most common sources of defects, the highest occurring type of defect, or the most frequent reasons for customer complaints, etc.

The Pareto chart was developed to illustrate the 80-20 Rule — that 80 percent of the problems stem from 20 percent of the various causes.

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