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Pareto Chart

Pareto chart is counted one of the tools of Seven QC Tools.

To Use Pareto Chart

Pareto chart is easy to make. But we have some check points.

Difinition of the Data

The first case is that, for example, for the same thing, some people call "dust", the other peole call "foreign body".

In this case, we need to count again.

Double Counting

The second case is that the production has more than two NG reasons.

In this case, we need to check that "each reason is counted separately" or "there is the priority of resons to count".

If the latter rule is used, we may have the hiddden problem.



Pareto chart by R is the codes to make Pareto chart.


R-QCA1 is easy to make.

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