If you specify the EXCESS=SUPPLY option, then there are three possible scenarios to deal with:
- Case 1: No Node with Missing D Demand, THRUNET Not Specified (see Figure 6.33)
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Drain the excess supply from all supply nodes.
- Case 2: Some Nodes with Missing D Demand, THRUNET Not Specified (see Figure 6.34)
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Drain the excess supply from nodes that have missing D demand values. If a node has a missing D demand value, then the amount it demands is determined by optimization. For a demand node with negative
supdemvalue, that value negated is equal to the sum of flows on all actual arcs directed toward that node. - Case 3: THRUNET Specified (see Figure 6.35)
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Drain the excess supply from all demand nodes. If a node has a negative
supdemvalue, that value negated is the lower bound on the sum of flows on all actual arcs directed toward that node. If a node has a missing D demand value, then the amount it demands is determined by optimization.
