Ventana software support forum

There are 3 different brands and corresponding demands and supplies. Each demand is initially met by its own brand. However, if there is not enough supply from that brand, the demand is met by another cheapest available brand. That’s why there are two outflows for Supply and Demand: (1) demand fulfi...

Hello, I use the ALLOCATE AVAILABLE function to prioritize different supplies in my model. However, I noticed that when the dt (time step) changes, the model outcomes also vary. I was wondering what could be causing this behavior. Unit consistency is maintained in the model, and the desired outcome ...

Hello, I have made some simplifications in my model. There is no demand shift during normal times; demand only shifts to the next cheapest product when inventory is unavailable. For example, consider three products A, B, and C, with the following properties: Brands: A, B, C Price[Brand]: 2, 4, 5 Dem...

Hello, In my model, there are two different brands of the same medicine. Patients generate demand for the brand reimbursed by their insurance. However, even if there is sufficient national stock, the specific brand demanded in some regions may not be available at the pharmacy level. In such cases, a...

Hi,

Large numbers in output tables are shown in abbreviated form, such as "6.72 M" instead of the full value "6,720,000". Is there a way to configure Vensim to display full numeric values instead of abbreviation "M"?

Thanks!

Hi, Is it possible to order outflows in Vensim, or do I need to handle this manually using functions like MIN or MAX? To clarify, I have a stock of products, and the intended sequence of outflows is as follows: first, sales are fulfilled; then, a certain amount is shipped to another facility; and fi...

Hello, In my model, I have a stock of patients who require medication. Some of them recover after receiving treatment and move to another stock (e.g., under treatment). However, when there is not enough medicine available, others stay in the stock for a certain period while waiting for medication. I...

Hi,

Thank you for your reply. How can I check or analyze the files generated by the sensitivity runs? I can view the results in the sensitivity graph in Vensim, but I am specifically interested in analyzing the output and identifying which parameter sets led to specific behavior patterns.

Hi, I have two questions related to run many simulations with varying parameters feature. 1. What is the memory limit for the save list? I understand that this limit depends on the number of parameters, their ranges, and the selected outputs, but does anyone have more concrete information about the ...

Thank you very much! I see that the order of the subscript matters. Now, my problem is solved.

Hello, Yes, I want to allocate "max shipment for spot sales" based on the market value for each product. I have 5 different products and 5 markets. However, not all products are allocated to all 5 markets. For example, a product might be allocated to only 3 markets because the other 2 mark...

Hello,

My model is attached. Thank you.

Kind regards,
Nazli

Hello, I am building a model that includes allocating the available supply based on the value (demand*price) of different markets. I use the ALLOCATION BY PRIORITY function, however, I receive two errors (1) "Illegal bounds on vector argument computing error" and (2)"Floating point er...

Hi, I'm building a model for vaccine prioritization. There are different priority groups and different vaccine doses. For a priority group to start first dose, the vaccinated stock of the previous group must exceed a certain threshold. I solved this creating a binary variable using IF THEN ELSE stat...