Subject: Capacity 3

Posted by Pedro D. Almaguer Prado on 12/4/2010
In Reply To:Capacity 3 Posted by Pedro D. Almaguer Prado on 12/4/2010

Message:

I have been studying the patterns shared by Tim and tell them that I feel more comfortable using a model structure for the carrying capacity similar to that shown below, I am also attaching the complete model in STELLA 9.1.3

Regardless of which structure is used, I think the part that handles the logic of the use of resources should be managed with various dimensions, where they represented the different resources that are the restrictions imposed by the system, for example if the goal of our model is to calibrate the results with historical behavior population dynamics of a deer population, we may assume there are resources like water and food that may restrict their growth.

So the model that manages the resources available and their behavior over time is handled using dimensions and so we simplify how it is represented in the diagram of the model that I share.

Irrespective of the final model is used, all the resources that limit the carrying capacity should be managed using the dimensions of Stella capacity, especially to simplify the understanding and comprehension of the model.

I have only one question in the formula for the variable "Current Sifespan, I now use the function "Arraymore (Effect_on_lifespan [*])* Normal_Lifespan", maybe there is something better to multiply " Effect on Lifespan " both water and food by the variable "Normal Lifespan", I hope everyone's opinions to enrich the shared.

Good evening, greetings.