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Pareto chart is one of the most important tools used by the six sigma consultants during the implementation of the projects. It was described by Vilfredo Pareto who was a renowned Italian economist. Categorization of the data is important for creating the Pareto charts correctly. The results are obtained in the form of graphs. This, unlike bar graphs, shows the output as frequency points.
A Pareto chart is considered an important tool for the six sigma projects. It was invented by an economist from Italy, Mr. Vilfredo Pareto. He was the one who showed through a formula that about 80% of the total wealth of a country is confined within 20% of the total population. This formula can be significantly used to define some situations in six sigma. For example, major critical problems in an organization are caused due to trivial number of errors. With the help of the Pareto chart and its analysis, one can estimate the error levels easily and eliminate those errors in order to achieve wholesome success. The main two phases of a DMAIC models are control and measurement where the Pareto chart is used. This chart usually helps to summarize the data for graphical representations. The graphs obtained vividly display the visible differences in the collected sets of data.
- Creating a Pareto Chart: One can create the Pareto charts quite easily if he has a complete understanding of the six sigma basics. As a matter of fact, during the certification program of green belt, Pareto charts and their usages are explained thoroughly. After collecting all the data related to the project you need to segregate it into different categories. For example say some of your business deals were delayed because a credit card application was not approved timely and you wish to investigate the reason with the help of a Pareto chart. Now the categories that you can create on the basis of collected data are:
- Signature mismatch
- Address mismatch
- Existing customer
Now the right and left vertical axes of the Pareto chart shows “Cumulative percentages” and “frequencies” respectively. The horizontal axis accommodates the variables. Now the results are calculated according to the inputs. The chart will not give any regular curves or bars. The yields are obtained in form of frequency points.
- Usage of Pareto Chart: Often people know how to make improvements to a process but they are not aware of the point from where they should start working. This is where the Pareto charts can help. There can be different types of errors and problems in a process like customer dissatisfactions, complaints, measurement irregularities, employee attrition and unnecessary delays and these errors round up to create major discrepancies in the process outputs. In order to create a Pareto chart one needs to collect and segregate the data in several categories. The results are obtained in the form of a frequency graph. This clearly shows the areas where improvement is required and changes can be made accordingly. In short Pareto chart can be a really useful tool in implementing six sigma projects successfully.
- Benefits of Pareto Chart: There are several benefits of the Pareto charts.
- First of all, it is used as basis for the six sigma projects. It means you can easily understand the starting point of the project with the help of a Pareto chart.
- The Pareto chart can be used as a guide to identify the major problems and also the minor ones. Knowing this will help you to set the agenda correctly.
- Setting the projects objectives in a proper manner is another benefit of the Pareto charts.
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