To counter the headloss from the increased demand load, two possible improvements are suggested:

• A much larger diameter is proposed for P-1 (the pipe from the reservoir). This physical alternative is created as a child of the Preliminary Pipes alternative, inheriting all the diameters except P-1’s, which is overridden.
• Slightly larger diameters are proposed for all pipes. Since there are no commonalities between this recommendation and either of the other physical alternatives, this can be created as a base (root) alternative.

These changes are then incorporated to arrive at the following hierarchies:

This time the demand alternative hierarchy remains the same since no demands were changed. The two new scenarios (Peak, Big P-1, Peak, All Big Pipes) can be batch run to provide results for these proposed improvements.