and then clicking in the diagram drawing area. Flows are connected by dragging
the flow connectors over an edge of the symbol.
12. Sources |
23 October 2005
To contents, Introduction, Chapter 13 |
Sources are start points for flows. Sinks are end points for flows. The sum of all flows from the source equals the source strength (flow).
A source is added to a system by first clicking the source button
and then clicking in the diagram drawing area. Flows are connected by dragging
the flow connectors over an edge of the symbol.
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| Figure 1. A source with a total source flow of 4 million worked man-years. |
The indicator SF (= source flow) in the figure above shows that a source flow is defined. The flow "Public work" is prescribed. "Private work" is calculated from the equation "Public work + Private work = SF". (SF = 4 Mwmy).
A source properties dialog is opened by right clicking on the source symbol.
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| Figure 2. Source properties dialog. |
The "Edit Source Flow" button opens the dialog in figure 3 below.
 |
| Figure 3. The source flow properties dialog. |
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