Automation Manager SPC Overview

Once the characteristics have been judge the data can be viewed in SPC charts.  The SPC data can be shown in an XBar Range chart and a histogram.  Each SPC chart show the upper and lower tolerances and the measurements that have been taken.  The data can be viewed in user defined sample sizes, or each measurement can be viewed on its own.  If sample sets are used a Range chart will be created to show the range within each sample.

Viewing the SPC Data

The Results Window generates an SPC chart for every characteristic measured by the result tools in loaded sequences.  These SPC charts can be accessed by using the blue right-arrow on the results tab, or by clicking the results tab to display the other windows available within the Results Window.

When looking at the SPC charts any point can be clicked to show the reading it reflects.

Use the Result Window to access the SPC charts.

Sample Size and Tolerances

The way the data is displayed in the SPC charts is determined by the Sample Size and according to the tolerances of each characteristic.  

The Sample Size determines how many readings are combined into a single mark on the SPC chart.  Click anywhere on the Result Window and choose "New Sample Size" to set the sample size for all the results in the Result Window.

The tolerances are set for each characteristic.  These tolerances can either be set on the result tool in the sequence, or by clicking the characteristic in the results window when in configuration mode.  The SPC chart will always display the upper and lower tolerances.  If the readings taken fall outside of the tolerances they may not appear on the SPC chart.  If the tolerances are very broad minute fluctuations may not be visible on the SPC chart.

If the tolearances have been changed the charts may need to be updated to reflect the new tolerances.  This can be done in configuration mode as well.  Click anywhere on the results windo and choose "Auto Set SPC Tolerances".

Viewing XBar or Histogram

The SPC charts can be viewed as an XBar Range or a histogram.  Click on the Results Window and choose "View Histograms" to convert all the SPC charts.  If the data is already in Histogram form then choose "View XBar Range" to view the data as an XBar Range chart.