Defining Utility as a deterministic table

• Double click on ‘Utility’ to bring up its object window
• Click on the Units field, type ‘$’.
• Press tab key to get to get to Description field.
• Type ‘The utility, or value to me, given party location and weather outcome, assigned in dollars.’
• Open pulldown menu of expression.
• Select Other

Expected: Object finder window should appear

• Click Library popup menu, select array -> Table Functions

• Scroll down on the main window and select ‘Determtable()’.
• Click ‘indexes’ button.

Indexes window should appear

• Select Party Location and Weather as your indexes

• Click ‘ok’ button.

• Click ‘ok’ on the Object finder window.

Expected: Determ edit table should appear.

• If necessary, change the row index to 'Party location' and the columns Domain of weather.
• Click on column Sunny, row header Outdoor.
• Change 0 To 100
• Arrow down
• Replace o to 90
• Arrow down
• Change o to 40
• Click on column header Rainy, row header Porch
• Replace 0 with 20
• Arrow down
• Replace cell value 0 with 50
• Click the green checkbox.

• Press result button

Expected: Result table of Utility will appear with row headers, Indoors, Outdoor, Porch and cell values 0, 20,50 will show

• Click on the Diagram button to return to the diagram window.

See Also

• Creating the Party Problem model (based on chapter 6 of tutorial)
• Tutorial: Decision trees