Wednesday 19 December 2018

About Pareto chart

Pareto Chart or Pareto Diagram is a tool that is often used in the implementation of the Lean Six Sigma method. The Pareto diagram, named by the Italian economist Vilfredo Pareto, serves to rank the varied categories or causes of a problem in the form of bar charts in order of frequency or magnitude from left to right. This diagram will help set priorities by separating the causes into the vital few or the trivial many .

 This diagram has two vertical axes - one on the left and one on the right. The left axis shows the actual frequency, or number of causes that cause it. The right axis shows cumulative frequencies in percent that show a cumulative contribution on a scale of 0 to 100%.

The following diagram shows the cause of customer complaints in a hotel within a month:

This diagram indicates waiting time in the reservation process, delivery time of room cleaning and room service, which contributed 75% as the cause of customer complaints that month.

Given the data, management can concentrate on improving the area and putting it in the priority. However, be careful in selecting areas that will be the highest priority target - waiting time in the reservation process may occur due to an outdated reservation system and replacing it in the near future may not bring about decent changes in the near future. If so, it might be better to move the focus of attention to other areas that are also the biggest cause of customer complaints.

Other uses Pareto Diagram

Another way of making this diagram is to sort the complaints based on the costs. That companies must incur to address complaints. The costs of eliminating the cause of the complaint. Or the time it takes to address the cause of the complaint. Each approach can produce a different sequence. You must choose the way that best suits your business situation.


The Pareto or Pareto Chart diagrams are very easy-to-use graphical tools to identify the main problem sources in the process. The use of the Pareto Diagram in the early stages of the problem solving initiative will make it easier. For the team to reduce the complexity of the project.

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