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Advanced Topics
Upstream supply and downstream demand
defines its own bias order. The table in the tabs indicates Prioritize 1 has the top bias order and Sensing 2 has the lower bias order.
Combine Priority Sensing model
The supply in branch B1 is 1,000 while the supply in branch B2 is 400. However, the Sensing 2 block doesn’t distribute flow following the expected supply proportion.
• Because the Prioritize 1 block has the top bias order, the Executive gives priority to that block in choosing how to distribute the flow between the branches B1 and B2.
• AtthefirstintermediateresultoftheLPcalculation,branchB1getsaneffectiverateof600 gallons/minute and branch B2 gets 0 gallons/minute.
• Because this decision has been made for branches B1 and B2, the Sensing 2 block with its lower bias order cannot control the proportion of flow it will get through branches B1 and B2. For example, if the supply from B1 is 1000 gallons/minute and the supply from B2 is 400 gallons/minute, the proportion between the effective rates for the Sensing 2 block’s inflow is not 71% B1 (1000/1400) and 29% B2 (400/1400) but rather 100% B1 and 0% B2.
Combine Sensing Priority model
Like the preceding model, the Diverge block (Prioritize 2) in this model is set to Priority mode and the Merge block (Sensing 1) is set to Supply Sensing mode and the Model Settings tabs for the blocks are set to Each block defines its own bias order. However, in this model the table indicates that Prioritize 2 has a lower bias order than Sensing 1.
Combine Sensing Priority model
• The Sensing 1 block has the top bias order, so the Executive gives priority to that block to choose how the flow it receives should be distributed between branches B1 and B2.
• AtthispointoftheLPcalculation,thePrioritize2blockgetsasupplyof1000gallons/min- ute and has not decided how to distribute the flow. With that limited information, the poten-
Discrete Rate

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