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Pareto Analysis VIs

Owning Palette: Statistical Process Control VIs

Installed With: Statistical Process Control Toolkit. The objects available on this palette vary according to the packages you have installed.

Includes VIs for counting and sorting assigned causes and for creating Pareto charts. In statistical process control applications, you might need to quantify and prioritize assignable causes that prevent a process from being in control or otherwise prevent a product from conforming to specifications. You can assign causes to a sample when you detect samples are out of control from a control chart. Other items can prevent a product from conforming to specifications that need to be analyzed, such as tabulated results from product inspection. You can total, order, and present causes using the Pareto Analysis VIs.

Palette ObjectDescription
Cause Code LookupGiven an unsorted list of numeric cause codes (an array of numbers), and a cause code lookup list containing the cause string for each cause code, returns a sorted list of causes with the count of the number of occurrences of each cause.
Pareto CounterGiven an unsorted list of causes and the number of occurrences for each cause, sorts the list from the cause with the largest number of occurrences to the smallest and computes Pareto statistics for each cause.
Plot Pareto ChartGiven a set of Pareto values that the Pareto Counter VI returns, this VI creates two Pareto charts and the associated legend. One is a bar chart of the frequency of occurrence of each cause. The other is a bar chart of the percentage contribution of each cause. The legend is a list of cause codes with their rank in a table (2D array of strings) format.

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