Knowledge Extraction

The Continuous Troubleshooter has comprehensive model analysis functionality for knowledge extraction. Once a process model has been constructed, the Knowledge Extraction view can be selected through the Troubleshooter project bar. The default view consists of the input and model trends, causal analysis, the active rule and input/output analyses. Further views can be selected from the Troubleshooter toolbar.

This page contains the following sections on Knowledge Extraction:

The Knowledge Extraction view
The Knowledge Extraction toolbar
Process simulation
What-if Scenario Analysis

The Knowledge Extraction view

The default trends show the model input trends. Further trends include the model output and target value, and the error trend.

Model Input Trends:

The model input trends are the default trend views. They show the inputs as used to train the model. Each input range is trended on separate axis.
Model Output / Target trend:

The model output and target values are trended on the same axis. On the same axis it is possible to visually view the correlation between the model output and target value.
Error Trend:

The error trend is assigned to a separate axis. It shows the error between the model output and the target value.

On the view palette there is not enough space to view all input trends. Different trends can be viewed through the scroll bar located on the right hand side of the trend axis. The different views can also be positioned using the up and down arrow positioning keys.

The model output and error trends can be viewed by dragging the top frame down. As with the input trends, the error trend can be viewed through scrolling down, or using the right mouse click option to "add" or "remove" views.

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Knowledge Extraction toolbar

The following options are available on the Knowledge Extraction toolbar:

Select:

Allows the user to position the slide ruler labels.
Scroll Axes Mode:

Allows the user to scroll on both the horizontal and vertical axes.
Zoom Axes Mode:

Allows the user to zoom in and out. Zooming in is done through sliding the horizontal axis to the right and the vertical axis up. Sliding the axis the other way zooms out.
Zoom In:

Zoom all axes in around the current center of the image.
Zoom Out:

Zoom all axes out around the current center of the image.
Zoom Box:

Allows the user to zoom in on a specific section.
Zoom To Fit Y Axis:

Zoom all the vertical axes in such a way that all of the current trend data is visible on the axis. After moving to a different position in time, some of the trend data may not be visible because the vertical axis was adjusted for only the visible data when the button was pushed.
Zoom to fit X Axis:

Zoom all the horizontal axes in such a way that the whole data set is visible. Only the horizontal axes are adjusted and this could mean that some of the data points may not be visible because they may be outside the current vertical axes range.
Inner Limits:

Display the low and high limits of all trends when checked.
Outer Limits:

Display the low-low and high-high limits of all trends when checked.
Show/hide playback Control:

Show or hide the playback control bar.
Show/hide Model Analysis Toolbar:

Show or hide the Model Analysis Toolbar.
Increase/decrease visible graphs:

This increase/decrease the number of graphs shown. This can be done on the top part of the Model Analysis view or on the bottom part. On the top part it switches between showing only the Model Output graph, and showing the Model Output graph along with either the error, cause or trend graphs. On the bottom part it increases/decreases the number of model input graphs that are shown simultaneously.
Show select region/position:

This switches between a single ruler (which is used for position selection) and two rulers (which are used for region selection)
Error trend:

This will change the graph below the Model Output graph to the error trend. The cause/trend graphs will not be visible anymore.
Cause trends:

This will change the graph below the. Model Output graph to the cause trends. The error/leverage graphs will not be visible anymore
Leverage trends:

This will change the graph below the Model Output graph to the leverage trends. The error/cause graphs will not be visible anymore.
Select Cause trends:

This function is used to select which cause trends should be displayed on the graph below the Model Output graph.
Select Leverage trends:

This function is used to select which leverage trends should be displayed on the graph below the Model Output graph.

Process Simulation

The playback bar is located above the Knowledge Extraction view.

The play button is used to start automatic playback.
The Jump to Start button will position the slide rule to the beginning of the data.
The scroll bar is used to set the playback speed.
The playback speed may also be entered in the edit box.
The skip forward and skip backward buttons will scroll the views by the amount specified in the playback speed edit box.

What-if Scenario Analysis

On each of the input trends there is a vertical slide rule. It shows the value of the trend at the slide ruler position. The slider may be adjusted to change the input value of the model. The result of this change to model input may be observed on any of the model analysis views. It will also change the current model output as shown by the red line on the model output slider.

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