\title{CMP80b Fall 06 PROJECT CHECKPOINT 2} 
\author{Robert Levinson}

The following guidelines should be followed when preparing your
project checkpoint 2.

\item
The goal of the checkpoint  is to have a firm design  on paper
of the model you intend to build before working with STELLA.

\item
Name the stocks in your model. For each stock,  
give units (lbs, dollars, happiness units, etc). Decide on a reasonable minimum
and maximum value for each stock.

\item
Name the flows (rates) in your model. 
For each flow give units (lbs, dollars, etc). Decide on
a reasonable minimum and maximum value for each flow.


\item
Combine the stocks and flows into a valid causal loop diagram. 
Ideally you will have about 3 loops.
Remember to label your arcs as + or -. 
Then label the loops as Reinforcing or Balancing.
To be interesting you will need both types of loops.

\item
Mark any delays in your diagram.

\item
Annotate each loop with a 1 or 2 sentence story/phrase/title 
about the story they tell.

\item
For each stock and flow, write an equation (or show a graph) 
of how its inputs are combined
to product its output.  

\item
Indicate any places in your model in which may later insert randomness!!

\item
Follow the number one law of system modelling: HAVE FUN!

\item
You should COMPLETE your outline of your paper into topic, subtopics
and subsubtopics.

\item
Pick 1 or more subtopics and write a 5 page draft 
of those sections as they might exist in 
the final paper.

\item
Give at least one diagram that will appear in the final paper.

\item
List at least 4 major "TODO" items for the final paper,
such as "read book X", "checkout this URL", "draw this diagram", etc.

\item
Follow the number one law of paper writing: HAVE FUN!