Understanding the Problem Browser

Describes the information displayed in the Problem Browser before and after execution.

The Problem Browser shows a structured view of the problem expressed by the model. See The Problem browser in the IDE Reference and Doing more with the Problem Browser in the IDE Reference for a complete presentation.

When you first open a project, the Problem Browser is empty. You can use it to browse the model before any execution and to examine the values after execution.

When you execute a run configuration, the Problem Browser provides a way for you to examine the solution to your model, in addition to what you see in The Output tabs. It summarizes information about the data structures defined in the model to express the optimization problem.

As an example, you can open the production project and run the Named data configuration. After the execution, the Problem Browser displays values for the model elements.

Observe the Problem Browser window.

• The drop-down list at the top displays the final solution, which is the only solution it contains after the execution of the Named data run configuration. For run configurations that generate more than one solution, the list displays the solution pools that were computed by the engine. Selecting one of these solutions from the drop-down list displays data for that solution in the lower part of the Problem Browser. See Working with the solution pool in IDE Tutorials.

• The categories in the Name column (Data, Decision Variables, Constraints) are populated with model objects and expanded to show the corresponding values. The order within each category is alphabetical.

• The Value column shows values for the model objects. The Property name and Property value columns remain empty until you select a model element.

• If you select an item in the main Problem Browser window (in this case, Capacity), properties for that object are shown in the Properties window.

  

• If you slide the cursor over a data object (in this case, Products), a Show data view button appears, as shown in the following screen capture with its tooltip visible:

  

  Clicking this button displays the data view in the main editing area:

  

For a large tuple set, the values may not all be visible within the window. In this case, an ellipsis appears at the end of the cell. Pass the cursor over the column to display all the values in a tooltip.