Ventana software support forum

Hello,

you could run a search on this forum and find the earlier discussions about DES vs. SD. References about the literature are also given.

Salima

Hello,

I used this accounting method in my model that I submitted to the Forum on the 9-3-04 for review. Let me know if you have questions.

Salima

Thanks a lot Pruyn for your comments about my model; I will include them in the model and good luck for yours!

Salima

Hello everyone, I will be thankful to anyone who would like to review my model and give me some hints / recommendations. I am doing it as part of one of the projects of the company for which I work. I have a model that is supposed to forecast the future sales of an automobile battery company in pres...

Thanks Tony and Lee for your answers. I meant by submodel, a sector or subsystem of the whole model. A "static" submodel would be, for example, an accounting/bookings submodel whom purpose is not to model behavior, but to report transactions. These transactions are caused by variables that...

When you model a problem with SD, is it preferable to start modeling the submodel that is "static" or rather start with the "dynamic " submodel. I mean by "static" the submodel where the equations and relationships between variables are clear mathematically (example : f...

Thanks Lee and Tony for your replies. Actually, I am sorry I didn't ask the question I really intended to. When I have a percentage or a fraction that is related to time, for example, the rate of increase of the deer population per year is 3% then, the unit (of the rate of increase) is unit/unit/yea...

I have a question about the units taken by percentages (ex.15%); sometimes their units are : -fraction -1/unit time (1/year or 1/month,..) -dimensionless My question is : do we choose one of these units according to the unit we desire to get for a resulting variable or is there another reason. Thank...

Lee

Thanks for your reply. I think also it is better to send you an example of a model that describes what I mentioned in my mail.
I will send it to you later.
Salima

Hi all, I usually find myself in the following situation: I compute the value of a stock (stock1) that must feed another flow (flow2) not linked to it but related to another stock (stock2). In terms of numerical values, flow2 is equal to stock1, but in terms of units, of course, it does not work sin...