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A paper and pencil approach to improving the reliability and consistency of your products and services.

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Pareto Charts

Use Pareto Charts to display the frequency of a variety of factors thought to effect a specific outcome.  List these factors along the bottom, and show the incidence of each with the height of the bar above it. Be sure to arrange the factors with the greatest or most frequent cause on the left, then the other, lesser factors in descending order towards the right. Instead of listing every one of the most insignificant factors, you may choose instead to combine them into a single "other" category. Pareto Charts are a great way to rank categorical data, to see which categories or factors are predominant. Improvement teams can then focus their attention on the vital few factors that cause most of the problems.


 
Pareto Chart Example

 

This Pareto Chart indicates that if the improvement team can reduce dripping water, (perhaps by getting the roof fixed and devising a way to channel condensation) and if it can make the conveyor belt system less hostile, (maybe with some padding and better guide rails) that it can eliminate the lion's share of carton damage. Furthermore, the damage caused by the wet floor and much of the problem of load shifting (think soggy cardboard), are also attributable to excess humidity in this fictitious refrigerated warehouse example.

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The eManual of Quality Improvement  -  Synerlux Consulting, 2005.  All Rights Reserved.


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