| Ø | Move the WIP graph to the right side of your screen so that it is not covering the sketch. |
You should see that the variable planning is highlighted yellow with blue text. This provides the second way to change the value of Game variables during the game.
| Ø | Click on the variable planning, you will see its initial value (4.166), press Enter to leave without changing the value. |
Note that the WIP graph disappeared behind the Build window. If we change the Game variable from the toolbar using the button Change Gaming Variables, the WIP graph will stay on top. Another way to keep the two windows visible is to reduce the size so both fit on your screen.
| Ø | Click on the reduce button  for the Build window (upper right corner, but below the reduce button for the Vensim application). |
The Build window containing the sketch will shrink to a smaller size.
| Ø | Resize and position the Build window and the graph window so you can see both the model (or at least the variable planning) and the WIP graph. |
| Ø | Double click on the Amount to Move editing box on the Game Toolbar and type in 5. |
| Ø | Click on the Move Forward button  |
The WIP graph will start to draw. Behavior is in equilibrium; we do not need to change any parameters because the gap in houses is currently zero (exactly on the middle gridline).
| Ø | Click on Move Forward once more, you will see the step upwards in the gap in houses. |
| Ø | Click on planning on the sketch, type a value of 18, then press Enter. |
| Ø | Click on Move Forward two more times. |
See how gap in houses reduces, while Houses Completed takes an upturn. We have almost closed the gap to zero. We had better stop building so many houses.
| Ø | Click on planning on the sketch, type in 0, then press Enter. |
| Ø | Click on Move Forward. |
Wow! We have overshot the mark; our goal (gap in houses) is now negative (below the middle gridline). Since we cannot plan negative houses, we had better plan zero houses for a while.
| Ø | Click on Move Forward until the gap in houses is positive (just above zero at about Time = 50). |
Now we should start building again so that we don't get a positive gap in houses (where more houses are required). We can anticipate this somewhat by building a little before gap in houses is positive.
