## Ventana Vensim - System Dynamics Modeling Simulation tool - 810:025 Fall 2010 - 11/01/2010

1. Due data: March 30th, 2011: Ventana Vensim modeling assignment #1: Ventana Vensim Assignment Spring 2011 810:025 class.
Assigned on Monday, March 21st, 2011.
2. Revew of Monday 11/01/2010 class: Please read pages 1 thru 6 of Vensim Tutorial 1.pdf and answer the following questions:
1. Where do the Sketch tools appear in the Vensim user interface?
2. What are names of the 4 Sketch tools (Building Blocks) listed in Table 3.1.1? PLease write down BOTH NAMES. Each of these four tools has two different names listed.
3. Which Sketch tool represents or is analogous to the role of NOUNS in the Vensim language?
4. Which Sketch tool represents or is analogous to VERBS?
5. The tutorial shows both a flow being a uniflow and a biflow (one directional flow and two-directional flow). Which one is actually used in the model the tutorial develops from pages 1-6?
6. Draw the diagram shown on the bottom of page 6 in Figure 3.1.7 b. Draw the diagram large enough so that you can take some notes about it's different components.

3. If you want to download the free version of Ventana Vensim PLE (Personal Learning Edition), it is available for both Macintosh and Windows PCs.
4. Ventana Vensim resources, links and assignment one information from Fall of 2009 810:025 class.
5. Model that we will develop on 11/03/Wednesday in class (portable laptop cart).
```growth=
growth rate * population
~	people/Month
~		|

growth rate=
0.1
~	1/Month
~		|

population= INTEG (
growth,
100)
~	people
~		|

**************************************************
.Control
**************************************************
Simulation Control Parameters
|

FINAL TIME  = 40
~	Month
~	The final time for the simulation.
|

INITIAL TIME  = 0
~	Month
~	The initial time for the simulation.
|

SAVEPER  =
TIME STEP
~	Month [0,?]
~	The frequency with which output is stored.
|

TIME STEP  = 0.25
~	Month [0,?]
~	The time step for the simulation.
|
```