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.

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.