The Selection Builder is used to select a group of projects for inclusion in an EMME/2 simulation network. It is launched by clicking on the Main Menu, or by running the network conversion program directly (for details, please refer to Running the 2.11 Toolbox).
The first step in building an EMME/2 network is to select a set of projects. This can be done in two ways. First, by using the button, you can use a set of projects that are stored in a list file. A list file is simply a list of Project Numbers in ASCII format, one per line, and can be created using any text editor. An alternative method of creating List Files is explained in Building an EMME/2 Network.
The second method of selecting projects is to use the Project Selection Builder, an English-language interface for describing sets of projects. As you click on buttons representing words, a selection sentence is built, describing the group of projects you wish to include in a simulation network.. The current sentence is displayed on the menu below the "I want projects..." message.
Tip: To build a Base Network, simply click on the button without defining a group of projects.
Selecting Projects by Date
Perhaps the most common method of grouping projects is by date. When a project is defined, it is assigned an implementation date. By using the , , and buttons with the list, you can define a group of projects by date. For example:
- I want all projects that are built before 2010 will select projects for a beginning-of-year 2010 network.
- I want all projects that are built before or during 1999 will build a end-of-year 1999 network.
Selecting Projects by Group
Sometimes selecting projects by date is not enough. For example, if you wanted to compare two 2005 year networks under different funding scenarios, say constrained and full-build, simply using dates would not give the desired results. Groups, however, can. If you have, for example, assigned all of your "must build" projects to Group A (see the Project Attributes Menu for a description of how this is done), and all of your "full-buildout" projects to Group B, then by using the and buttons, selecting your two groups of projects is easy. For example:
- I want all projects that are built before 2006 and are in group A will select a financially constrained 2005 network.
- I want all projects that are built before or during 1997 and are in group B will select the projects in a full-build 1997 scenario.
Tip: Projects can belong to more than one group.
Including or Excluding Specific Projects
There are times when you may want to select a more specific group of projects than is possible by using dates and groups alone. By using the and in conjunction with the list box, you can add or remove specific projects from the selection criteria. For example:
- I want all projects that are built before 1999, except for 10, 11, 12 will select a end-of-year 1998 network without projects 10, 11, and 12.
- I want all projects that are in group A; Also 5, 6, 7 will select all projects in Group A, as well as projects 5, 6, and 7.
Putting It All TogetherBy using the , , , and buttons, it is possible to combine the above elements, adding and excluding projects by date, group, or individually to create elaborate project selections.
The button can be used to erase the selection sentence word by word. To clear the entire sentence and start again, click ion .
To show a list of projects selected by the current selection sentence, click on . will highlight the selected projects in the ArcEdit window.
When you are satisfied with the list of projects you have selected, click on to build an EMME/2 network. aborts the selection process, and returns you to the Main Menu or the ArcEdit prompt, depending on how you ran the Selection Builder.