The Demand Control Center is an editor for manipulating all the demands in your water model. Using the Demand Control Center, you can add new demands, delete existing demands, or modify the values for existing demands using standard SQL select and update queries.

The Demand Control Center provides demand editing capabilities which can:

• open on all demand nodes, or subset of demand nodes,
• sort and filter based on demand criteria or zone,
• add, edit, and delete individual demands,
• global edit demands,
• provides access to statistics for the demands listed in the table,
• and filter elements based on selection set, attribute, predefined query, or zone.

In order to access the Demand Control Center go to Tools > Demand Control Center or click Demand Control. The Demand Control Center opens.

The Demand Control Center toolbar includes the following:

New	Clicking this button opens a submenu containing the following commands: Add Demand to Element —Adds a row to the table, allowing you to assign a demand and demand pattern to the element that is currently highlighted in the list. Add Demand —Opens the Domain Element Search box, allowing you to select elements in the drawing pane and assign a demand and demand pattern to them. Initialize Demands for All Elements —Adds a row to the table for each element (each junction if executed on the Junction tab, each hydrant if executed on the Hydrant tab, etc.) in the model that does not currently have a demand assigned to it. The initialized rows will assign a Base Flow of 0 and a Fixed demand pattern to the associated elements.
Delete	Deletes an existing demand.
Report	Generates a demand report based on the contents of the table.
Create or Add to a Selection Set	Creates a new selection set containing the currently selected elements, adds currently selected elements to an existing selection set, or removes currently selected elements from a selection set.
Zoom	Zooms to a specific element.
Find	Opens the Domain Element Search editor.
Options	Provides access to global sort and filter capabilities.
Query	Opens a submenu allowing you to filter the table according to one of the following: Selection Set : The submenu contains a list of previously created selection sets. If you choose a selection set only those elements contained in that selection set will be displayed. Attribute : If this command is selected, the Query Builder opens, allowing you to diaply only those elements that meet the criteria of the query you create. Predefined Queries : The submenu contains a number of predefined queries grouped categorically. For more information about these queries, see Using the Network Navigator.