Golden batches are the results of reactions with good product characteristics.
These are usually used as reference batches for other runs. In the application
context a golden batch is simply the saved trend data of a good reaction
run. Golden batches can be added to another reaction to compare this reaction
to the reference run. The following view shows an example reaction with
two added golden batches and a corresponding limit:
The options for the golden batches are found in the Limit
Tab of the Parameter Panel.
The following options are available:
Statistical Base Value:
Selects the statistical value to be calculated from the added golden
batch data. This value will be used to calculate limits for the reaction
control. The available statistical values are:
- Data Shape: Calculates a "shape" of the golden batch data
by simply calculating the minimum and maximum value per data point.
- Average: Calculates the average of the golden batch data.
- Standard Deviation: Calculates the standard deviation.
- Variance: Calculates the variance of the golden batch data.
If this option is selected the average of the golden batch data will
be displayed as plot in the trend view.
Show Data Shape:
If this option is selected the data shape of the golden batch data
will be displayed as colored region in the trend view. In the example
above this is the yellow area.
Selects the color for the display of the golden batch plots and data
Lists all golden batches that have been added to the reaction. The
data plots of individual golden batches may be turned of by unchecking
the corresponding checkboxes. Disabling a golden batch in this section
only affects the data plot display, the batch will still be used for the
calculation of the statistical base value.
Golden batches can easily be used to create limits for a reaction run.
This allows to control a reaction on the basis of a reference run. In
addition to the golden batches the user simply needs to add a limit. The
limit will provide factors which will be used to calculate the lower and
upper boundary using the statistical base value of the golden batches.
Please perform the following steps to create a limit from golden batches:
Add golden batches to the reaction.
Choose the Statistical
Base Value for the limit calculation.
Add a limit to the reaction. In contrast to the regular
limits the golden batch limit will show the fields Low
Factor and High Factor as
factors. The actual limit will be calculated by the following formulas:
- Data Shape: Low Limit = Data_shape_minimum
- Low_Factor, High Limit = Data_shape_maximum + High_Factor
To add a golden batch existing trends simply need to be added to the
reaction. This can either be done by directly opening the trend file of
the golden batch run or by transferring a current trend to the main application
and saving it from there. Please perform the following steps to add a
golden batch to a reaction:
Switch to the Limit
Tab of the Parameter Panel.
Click on the Add Golden
Batch button in the control panel. A file selection dialog will
Select the trend files to be added as golden batches
and click the Open
The selected golden batches are added as data plot and
data shape to the trend view.
If a limit is need then add a limit via the
and adjust the limit factors.