& Construction
Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
& Manufacturing
Professional CAD/CAM tools built on Inventor and AutoCAD
Describe scenarios and how they are used to explore alternative models, as well as their relationship with datasets and facilities.
Scenario Management allows a hydraulic modeler to analyze and compare multiple alternatives based on different features, such as demands, pump controls, or tank sizes. Before creating scenarios, it is helpful to understand how they work, and the relationship scenarios have with facilities and datasets. Scenarios are created and modified using the Scenario Explorer.
To open the Scenario Explorer:
Datasets are the key component of scenarios, and are used to represent any differences, such as pipe diameter, tank size, or pump curve.
To select datasets for a scenario:
To view, clone, and create new datasets, use the Dataset Manager.
Datasets are modified by editing attributes and parameters. The dataset you choose to edit depends on the element and property being studied. Many single elements (for example, one junction) can have a BASE dataset and a non-BASE dataset, such as a Demand Set and a Fireflow Set. Most scenarios contain many BASE datasets, which is why editing BASE datasets from the BASE scenario is recommended. A common mistake is editing one non-BASE dataset, then another feature attribute that references a BASE dataset. You should understand exactly which parameters are contained in each dataset.
All scenarios originate from the BASE scenario, or parent scenario. Child scenarios are created when scenarios are created new or cloned. Child scenarios can then either inherit the dataset from the parent scenario, or they can use a scenario-specific dataset. An inherited dataset will update automatically in the child scenario to match if the parent scenario is changed. But a scenario-specific dataset will not change if the parent scenario is changed. Child scenarios do not inherit the facility definition, which always reverts to the active network.
To edit the datasets of the active scenario, in the Scenario Explorer, click Edit Active Scenario.
Be aware that the BASE scenario cannot be edited using this tool. The primary purpose of this tool is to allow you to create a new dataset in a scenario to replace a dataset without needing to change scenarios.
A scenario may simulate a unique portion of the system or the entire network. For example, any proposed pipes should not be included in a scenario that represents existing conditions.
To manage which network elements apply to a scenario, in the Scenario Explorer, click the Facility tab.
To set specific simulation and report options as well as time settings, in the Scenario Explorer, click the General tab. If these parameters are not specified in the Scenario Explorer, then the options and settings that were last selected will be displayed when the Run Manager is opened.
IMPORTANT: When setting up a scenario, switch to all the tabs in the Scenario Explorer to make sure that everything is set up how you want.
In the Scenario Explorer, you can create a Batch Run to run simulations of multiple scenarios.
The results of all scenarios simulated in a batch can be compared in reports and graphs. You can also compare the scenarios themselves to see the differences between them.