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选题[tech]: 20200703 How to Create a Pareto Diagram [80/20 Rule] in LibreOffice Calc
sources/tech/20200703 How to Create a Pareto Diagram -80-20 Rule- in LibreOffice Calc.md
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[#]: collector: (lujun9972)
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[#]: translator: ( )
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (How to Create a Pareto Diagram [80/20 Rule] in LibreOffice Calc)
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[#]: via: (https://itsfoss.com/pareto-chart-libreoffice/)
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[#]: author: (Dimitrios Savvopoulos https://itsfoss.com/author/dimitrios/)
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How to Create a Pareto Diagram [80/20 Rule] in LibreOffice Calc
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======
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_**Brief: In this LibreOffice tip, you’ll learn to create the famous Pareto chart in Calc.**_
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The [Pareto Principle][1], also known as the 80/20 Rule, The Law of the Vital Few and The Principle of Factor Sparsity, illustrates that 80% of effects arise from 20% of the causes – or in layman’s terms – 20% of your actions/activities will account for 80% of your results/outcomes.
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Although the original observation is related to [economics][2], it can be widely adopted and used across all aspects of business, economics, mathematics, and processes. In computer science, the Pareto principle can be used in [software optimization][3].
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Let me show you how to create a Pareto diagram in [LibreOffice][4] spreadsheet tool, i.e. Calc.
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### Creating Pareto diagram in LibreOffice Calc
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![][5]
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To be able to create a Pareto diagram, you need these three basic elements:
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* The factors, ranked by the magnitude of their contribution
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* The factors expressed numerically
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* The cumulative-percent-of-total effect of the ranked factors
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First, enter the data in a spreadsheet. Now let’s get started!
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#### Step 1: Sort the data
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Mark all rows from first to the last and at the **Data** tab click on the Sort option. At the **Sort Criteria** tab choose **Sort key 1** and change the entry to **Number of Errors** or whichever name you choose. Make sure to tick **Descending** and finally **OK**.
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![][6]
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#### Step 2: Create the Cumulative Percentage values
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To calculate the cumulative percent of a total, you will need one formula for the first cell (C5) and a different formula for cells C6 and below.
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**Generic formula for the first cell**
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```
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=amount/total
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```
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**In the example shown, the formula in C5 is:** =B5/$B$15
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**Generic formula for the remaining cells**:
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```
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=(amount/total)+previous cell result
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```
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**In the example shown, the formula in C6 is:** =(B6/$B$15)+C5
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By dragging the fill handle down, you will get the correct formulas for the remaining cells.
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![][7]
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#### Step 3: Create the Pareto diagram
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To create the chart go to **Insert** tab and then click on the **Chart** option.
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In the upcoming Chart Wizard choose the chart type **Column and Line** with **Number of lines** set to 1 and click Next.
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![][8]
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Select the correct data range **$A$4:$C$14** by either using your mouse in the data range selector or by entering it manually. Leave the settings **Data series in columns**, **First row as label**, **First column as label** and click Next.
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![][9]
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The following Data Series window should have everything filled in correctly, click Next.
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![][10]
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In the last window enter titles and remove the legend:
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* Title: Pareto chart
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* X axis: Error Type
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* Y axis: Number of Errors
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* Untick **Display legend**
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* click **Finish**.
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![][11]
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And this is the result:
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![][12]
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If the red line appears without any value, select it, then right click > Format Data Series > Align Data Series to Secondary y-Axis > Click OK.
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#### Step 4: Fine tune the chart
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The range of the secondary y-axis is set to **0 – 120** , it needs to be up to **100**.
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Double click on the secondary y-axis . In the **Scale** tab, untick **Automatic** and **enter 100** as the maximum value. Then click ok.
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![][13]
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All done!
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![][14]
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**Conclusion**
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Using a Pareto chart to analyze problems in a business project allows focusing efforts towards the ones offering the most considerable improvement potential.
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This is one of the many real-life scenario where I have used LibreOffice instead of other proprietary office software. I hope to share more LibreOffice tutorials on It’s FOSS. Meanwhile, you can [learn these rather hidden LibreOffice tips][15].
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Which LibreOffice functionality do you use the most? Let us know at the comments below!
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--------------------------------------------------------------------------------
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via: https://itsfoss.com/pareto-chart-libreoffice/
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作者：[Dimitrios Savvopoulos][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://itsfoss.com/author/dimitrios/
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[b]: https://github.com/lujun9972
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[1]: https://betterexplained.com/articles/understanding-the-pareto-principle-the-8020-rule/
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[2]: https://en.wikipedia.org/wiki/Pareto_principle#In_economics
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[3]: https://en.wikipedia.org/wiki/Program_optimization#Bottlenecks
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[4]: https://www.libreoffice.org/
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[5]: https://i2.wp.com/itsfoss.com/wp-content/uploads/2020/07/pareto-libreoffice.png?ssl=1
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[6]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/1.-sort-the-data.png?ssl=1
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[7]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/2.-cumulative-percent.png?ssl=1
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[8]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2020/07/3.chart_.png?ssl=1
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[9]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2020/07/5.data-range.png?ssl=1
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[10]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2020/07/6.data-series.png?fit=800%2C381&ssl=1
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[11]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2020/07/7.chart-elements.png?fit=800%2C381&ssl=1
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[12]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/8.Pareto-chart.png?ssl=1
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[13]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/9.fine-tune.png?ssl=1
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[14]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/10.final_.png?ssl=1
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[15]: https://itsfoss.com/libreoffice-tips/
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