Ventana software support forum

Hi All,

I am looking for some useful resources on how to move from causal loop to stock and flow diagrams, any help?

Thanks

Dear All,
Can you give me your opinion about this loop.
Thanks

Thanks admin, My question whether is part of the model is working ? is it good to start with ?

Thank you very much for your help, but what about the student population part?

Hi All,
I wrote a paper about that I will share it with you soon

Hi All, I am working on a university model, The purpose of this model is to study the best choice of investment for a university manager. the university should invest in facilities or increase number of available staff, these decisions should help in increase probability of offer rejection rate. The...

Hi All,

Somebody was asking me about system dynamics and about the model which I build and the equations behind it, as the discussion was from where I bring this models? is it start with mathematics or statistics and end like that?

so what should I reply?

Thanks Tom,

but I could not find it so what do you suggest?

Hi,

where can I find SyntheSim option in vensim DSS?

Many thanks.

if the same variables are used in more than one model, how can I execute them one at a time?

I have several model and when I do the simulation its give me strange results so can I test model by model ( all the models are connected to each other ) to can figure out where is the mistake?

Thanks

What baseline Scenario mean and why we use it ?

Thanks, I did that but the problem is still available ,,,

but I was thinking is the final time is the same one in the model when we put the setting of the model?

maybe from there the problem ?

mmmm and am not sure how to do that...

Yes.

LISTVAR,"FINAL TIME",88,24,7,4,L|System|10|B|255-0-0,[0|60]10|20|30|40|50|60

so this is what I wrote, so what do you think the problem?

I have a problem with the listvar it keeps give me that the listvar is empty so what is going on ?

do I need to change anything in my model to make it work ?

Hi,
If I want to know more information about the behaviour validation methods can you advice me what to read or where to go?

Nadia, have a quick look on this paper it will give you a great idea about SD validation methods

http://ieeexplore.ieee.org/stamp/stamp. ... r=05480403

Many thanks Tony, I solve it, but I might send it to you to have a quick look and give me your opinion

on the other hand I still have a problem with the listvar it keeps give me that the listvar is empty so what is going on ?

do I need to change anything in my model to make it work ?

Thanks I mange to change it, but the error is still here so what ales might be wrong ?

Thanks Tom , but from where can I change it , I checked in the equation editor but I could not find where?

Is that what u mean ? :SCREEN NAMERUN SCREENFONT,Times New Roman|10||0-0-0|-1--1--1 COMMAND,"",0,0,0,0,,,SIMULATE>RUNNAME|?Name for new game output COMMAND,"",0,0,0,0,,,GAME>GAMEINTERVAL|0.25 COMMAND,"",0,0,0,0,,,MENU>GAME|O CLOSESCREEN,"",0,0,0,0,,,,GAMEINI !...

Yes I have and as i said when I test screen its work so what do u think the problem?