Monitor variables without model influence in SIMCA-online (Q914)

The information in this article applies to: 
SIMCA 16
SIMCA 15
SIMCA 14.1
SIMCA 14
SIMCA 13.0.2
SIMCA 13
SIMCA-online 16
SIMCA-online 15.1
SIMCA-online 15
SIMCA-online 14
SIMCA-online 13.3
SIMCA-online 13.2
SIMCA-online 13.1
SIMCA-online 13
Summary: 

To monitor a variable in SIMCA-online it needs to be either (A) part of the model or (B) part of a generated variable that is part of the model. 

In case (B) you can exclude the variable and still monitor it in SIMCA-online. Case (A) is described in Workaround below.

Workaround: 

To make an original variable lack influence on the model and predictions, both in SIMCA and in SIMCA-online, and still keep it in the model:

  1. Open the Workset and click the Scale tab.
  2. Mark the variable.
  3. In the Modifier field, enter 0 and click Set.
  4. Close the Workset dialog and make sure that you click No to not remove the modified variable that now lacks variance.
More Information: 

Note that down weighting a variable using a very small weight in order to make it lack influence may result in unexpected behavior in the DModX plot in SIMCA-online. We therefore advise against that method.

See also https://umetrics.com/kb/monitoring-variables-excluded-evolution-models-simca-online.

Date modified: Nov 14, 2019
Article type: 
Information