Accepted Solutions
Electric Network are partioned because each tier are indipendent and they have their own object (trasmission is totally different from distribution). Look at the scheme, the line are top-down without connection between:
The hierarchical tiers are nested and each tier could be connected. In this case the commodity is recycled and it can loop from different stages
Electric Network are partioned because each tier are indipendent and they have their own object (trasmission is totally different from distribution). Look at the scheme, the line are top-down without connection between:
The hierarchical tiers are nested and each tier could be connected. In this case the commodity is recycled and it can loop from different stages
Esri uses partitioned tiers when the model allows each subnetwork to operate independently of the subnetworks above and below it. This means that each feature belongs to a single subnetwork with no persisted dependency or knowledge of any higher or lower-rank networks, it is only discoverable via outside of upstream/downstream tracing.
Hierarchical networks are used when subnetworks are considered nested. That is to say that one subnetwork will act as a form of "ultimate source" that supplies/receives all the resources in an area (wastewater treatment plant, water wells, gas custody transfer meters). The lower-rank subnetworks then subdivide this higher-level system into smaller and smaller zones based on different criteria (pressure reducers, pumps, compressors, lift stations). The following diagram below shows how water tiers are nested in each other with water sources creating a Water System, pumps/pressure valves providing Water Pressure zones, and system valves allowing a utility to further refine their territory into Water Isolation zones. In a hierarchical network each feature belongs to multiple subnetworks, and as such has multiple subnetwork fields (SystemSubnetworkName, PressuresubnetworkName, IsolationSubnetworkName).
Hi @RobertKrisher thanks for help, could you provide some clarification for me! You mention that there is like a single Water tier group which include 3 Tiers (System, Pressure, and Isolation) which is okay for me. BUT from the following Esri's help screenshot:
I understand that it should be 3 or 4 tier groups:
- WaterGathring
- WaterTransmission
- WaterDistribution
- WaterCathodic (I think it's not a must, however).
So as I mentioned above, I'm not utilities expert I don't have the knowledge of how the system or business model flow. But I do some research on Electric industry and how to model it with UN, and I came with that, in electricity we have generation (UN tier1) network which generate the electricity and send it to the Transmission (UN tier2) network and send it to the Distribution (UN tier3) network which provide electricity to the consumers. This is the basic or simple business model and I understand well.
Now If we move to Water industry (I didn't study how the industry works) as I understood from Esri' screenshot above that the water flows between the 3 or 4 tier groups. From gathering to transmission to distribution, Isn't?
