Ventana software support forum

Hi JJ, I really appreciate your insights. I'll try my best to express my thoughts with plain English. My modeling work has two primary goals. First, my client A wants to know how labor productivity affects the working rate. That is already exhibited in the model. Second, because of the interdependen...

Hi JJ, Thanks for your advice. I just posted a simplified model to clarify my question. In my model, the level of "Concurrence" (high or low) determines the availability of "Tasks to Do (B)," which subsequently affects the "Working Rate (B)". I wonder if such definition...

Hi, Attached model aims to model the planning phase of product development. I divide the initial "Tasks to Plan" into "int." and "sc." In the model I use a variable "sc concurrency" powered by a lookup with "%Tasks Released" by "Tasks to Plan(in...

Dr. Bob, Thank you very much for your advice. It's so stupid that I didn't use the level. Instead, I marked "project duration" as a variable in which "Time" (unit:day) accumulates, i.e. ++, until project is done. Iappropriate trials get me into a blind alley... Howard Originally ...

I don't know whether"Dynamic Modeling for Business Management: An Introduction" by McGarvey and Hannon can be seen as an advanced SD textbook. From my point of view, I feel the book provides useful and reusable examples of models but it is kind of lacking in theoretical arguments and pholo...

Hi, I'm currently working on a SD model of product development. Inspired by "Dynamic Modeling of Product Development" (Ford, 1998), I build my own model and use a variable named "%Tasks Done" to observe project duration. For example, if "%Tasks Done" reaches 100% in the...

Hi, Actually I want to model the conurrency between company X & company Y. The % finished in stock X (Unit:Tasks) may determine the percentage of taks in stock Y that are capable of being exectuted. For example, when X finishes 50%, 50% of Y can be done, then X finishes the remaining, and finall...

Hi, JJ,

I have mailed a model to you.
If it's available, would you please help me check the
RandomLookup function in the model?
I'd appreciate any suggestions from you.

Thanks,
Howard

Hi, Bob, I think it would be better to describe my question more specifically. As I mentioned above, my goal is to create a lookup function in whcih Y goes up from 0 to 1 while X rises from 0% to 100%. Hence Y can multiply by another variable Z and its value will exhbit a "random incremental&qu...

Actually I'm using Vensim DSS.
(Lots of Random functions are embedded.)
And I just feel so confused.@@

Thanks for your guidances. However, I still can't use the function smoothly. The situation is there is a X(min:0 max:100 unit:%) Y=f(X)(Y min:0 Max:1 unit:Dmnl). I want to let the f(X)=Random Lookup(x1,x2,x3,x4,x5,x6) I have tried many times but the first argument seems to "miss right hand pare...

Hi,
does anyone have any idea about the use of
"Random Lookup" function?
I kind of feel confused about the 1st augment of this function? Would you please provide an example?

Thanks,
Howard