Ventana software support forum

Hey all, i hope you can help me on this one. Vensim PLE Version My problem I have defined a rate A by which my capacity increases each year. After 21 years the capacity is ready for the next level. In the rate B i need the value of the first time step (the beginning) from rate A. So it might be clea...

finally i realized your suggestion in my model. Well, on final time comparising is possible, but unfortunately i need the value for the decision on time step to determine wether the first or the second choice is been realized!
Thinking about conceptual changes!

Thnaks anyway!

Regards
Pet

thanks for the help, seems like at least one way i can try. But you need to be more specific please. I cant follow!

Regards

Pet

Hey Bob,

like you say! this will help!

Some advice?

Thanks anyway!

Regards,
Pet

Hello, i'm sorry for the late responds, just came back from a trip. You stated: ".....you do not have to accumulate the values into a stock to calculate the present value: there are formulas like Present value = old value /( 1+i)^n where n is the period and old value is the cash in. you do not ...

counting parenthesis is no problem, in the case of 100 decision kind of exhausting. I could image the equation, needed your ratification ;). in case of quote 1: i dont get it either;) Assume: three decisions with the same duration, starting at different time steps. The Present Value therefor is diff...

thank you very much for the quick response! suggesting your solution, things make it a little easiier. Still i have some request. The maximum values for each decision occurs on different times. Lets assume D1 starts in 7 years and ends in 10 years. D2 starts in 5y and goes 10y also. D3 starts today ...

Hi there, i use Vensim PLE for modelling capacity development. My problem is to the decsion making rule. Therefor i established differnet views, for each view calculated the Present Value of investment. The Present Value will be a level variable. at the end of time (not FINAL TIME) the present value...