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PERFORM — Graphics Overview

Several charts are available for examining your data and assessing performance.

Process Performance Analysis Charts

These charts provide a display of observed performance and the estimated variance components.

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Histograms

Histograms provide a display of a data set and show where the values fall. This provides an understanding of the data in terms of shape, spread, and location.

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Box & Whisker Plots

Box & Whisker plots provide a display of the Low, High, Q1, Q3, Median, and outlier points in a data set. It is particularly useful at comparing several groups.

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Control Charts

Control charts display data through time and allow evaluation of through-time stability. When control limits are not used, a Run chart is displayed.

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Frequency Plots

Frequency Plots display tables of frequencies, relative frequencies, or cumulative frequencies of groups in a data set. This is also useful for making comparisons among multiple groups.

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