| The Tucannon Harvesting Model |
| The original Mac version is a 52 KB Stella file. It was constructed
with Stella Research 5.0 and tested on a Quadra 610 with a 13" monitor.
(The interface fits nicely on this monitor with the page setup at 60% print
reduction). Aladin Systems' Stuffit was used to create a 15KB archive file
which you may download to your computer. After the file is unstuffed, try
the setting the harvest fraction to 75% after the 120th month and leave
the other parameters at their default values. You should receive a congratulatory
note when the cumulative harvest exceeds $5 million around the 250th month
of the simulation. Click HERE to download the model. |
The windows version is a 52 KB Stella File. It was construced
with Stella Ver 5.0 and tested on an IBM ThinkPad with a 12" screen
using Windows 95. The Winzip program was used to compress the file to 16KB.
After the file is unzipped, try the a simulation with 50% harvesting after
120 months. If you leave the other parameters at the default values, you
should receive a congratulatory note that the cumulative harvest exceeds
$5 million around the 250th month of the simulation Click HERE to download the model. |
A Vensim version of the Tucannon Salmon Harvesting model was
constructed with Vensim PLE Plus. (The PLE version does not allow gaming
simulations, like the simulation shown part way through a game on page 166
of the book. So you need PLE Plus to run the model.) The model is stored as a *.mdl file, a regular Vensim file. It should open with a control panel in view. Click on the game option (the boy kicking the ball) and set the game to run 24 months at a time to match the type of games described in Chapter 14. Click HERE to download the model. |