Ventana software support forum

Hi, I need to draw a Stock-flow diagram to see the effect of used materials on different types of cost. I compare the used material cost with the new material cost. I assume the demand for aggregates increases yearly, but supply for aggregates reduces over the time regularly after a certain period (...

Hi, I need to define a variable (the use rate). I assumed the use rate slowly increases to a peak and then gradually decreases. How can I define this type of variable in a stock-flow diagram?

Please help me

Hi.. I am using Vensim to draw a simple stock-flow diagram. The purpose of the model is to measure the effect of changes in one decision variable on the total cost over 20 years. I am not sure about the model I created. Is there any way to get feedback for the developed models? My mind is always arg...