Ventana software support forum

Dear Tom you've been a great help to me, many many thanks.

sorry man can I ask you a favor again? would you please run the attached models in DSS double precision version and give me back their results so I can figure out what to do in the complex model?


Best Regards
A.m

Dear Tom many many thanks for your reply as I told you before in the complex model it's very important for me that the aggregate variables ,such as "3" in the sample model , come exactly into equilibrium.so can I ask you a favor ? is it possible for you to run my model in a DSS version and...

the problem is that while the vensim doesn't consider the differences between the arrival and discharge rates of variables "1" and "2" in their values how can I balance the variable "3" , which its arrival rate = arrival rate of variable "1" + arrival rate of ...

Dear Tom thanks for your reply.
you know I'm just a MS student and I just use the Vensim for academical purposes . so I would be appreciate if you tell me that is there a way to solve this problem in Vensim PLE ??

Best Regards

I suggest you start by adding units to all your variables and make sure the model passes the unit check. It may be that you have an error, this basic check can often uncover these. you know everything is fine and I checked the complex model three times before. I just made this simple model to tell ...

thanks for your reply for me it is very important that variable "3" return back to a balanced state. as you can see while both the variable "1" and "2" return back to balanced states , variable "3" never gets balanced and that's why I want to figure out what i...

Hi, I want to balance a complex model but I think there is a problem in my vensim. in fact,Apparently Vensim doesn't consider little differences between the arrival rate and departure rate from a box variable. for a better understanding I attached the sample model. please look at the image below and...

Dear JJ

I really thank you and I really appreciate you for the time you spend for me .
what you said is completely right .


Best Regards
A.M

Dear JJ Thank you very very much. you are completely right and I was wrong because I didn't consider the role of the "One hour" variable in the model .but as I mentioned above , normally patients are held in a department until a bed get available ( for example they are boarded in ED until ...

Hi The original model does not verify the mass balance check. There is a mistake in the calculation of the 'potential GW admitting'. You must take into consideration the discharging. In fact one must first discharge, first priority, than admit trauma, second priority, than admit others pt third pri...

Dear Tom At first let me say that I'm indebted to you for your help and I really appreciate you for the time you spend for me . I use the Vensim PLE and it seems that there are just two integration types 1-Euler 2-RK4 Auto and there is no Diff integration type in PLE version.In addition, when we con...

Dear Tom Many many thanks for helping me, that was just what I need. there are still some little problems that i cannot fix them : 1- after simulating, the values of "trauma patients waiting" and "other patients waiting" are incorrect only at day 1. 2- the value of the "GW p...

i'm very thankful for your reply. 1-suppose that we have 2 categories of patients who want to be admitted in a General Ward(GW) 1- Trauma patients 2-other patients .normally , if GW isn't at full capacity ,at first Trauma patients are admitted and then according to the remain beds, other patients ar...

Many thanks for the prompt reply suppose that variable1 and variable2 both are box variables. consider variable2 equation = IF THEN ELSE(arrival-discharge+8+ variable1 <=capacity,0, arrival-discharge+8+ variable1 -capacity) suppose that we are at time 5 now. we know that for computing the present va...

hi is there any function which operate in the opposite way that DELAY FIXED( {in} , {1} , {init} ) operate? ex)I mean a function that gets variable1( var1 ) and returns variable2 ( var2 ) time 0 -----1------2-----3-----4 var1 0 ----- 2 ----- 5 ------ 7 ----- 16 var2 2 ----- 5 ----- 7 ------- 16 --...

hi everybody i want to know how much time a person wait in a box variable ? for example in the attached model i want to know how much time a person wait in box2 before enter to box3 ( i want that if a person waits more than 4 hours he doesn't enter to box3) 1.mdl link : http://s000.tinyupload.com/in...

Administrator wrote:Can you use a lookup table?

my friend , I thank you very much too .


i find another solution : 3 + pulse ( 2 , 2 )

bppro wrote:Maybe the STEP function is what you're looking for. Please take a look at my model.

Have a nice day,
BP

that's what i need . very very tnx my friend .

I don't really understand your question, it would really help if you posted what you have tried. Can you just use an auxiliary that has IF THEN ELSE in it? For example, A TEMP = DELAY FIXED (b,c,d) A = IF THEN ELSE ( time > start time , A TEMP , 0 ) first tnx for your response second : the question...

hi guys as you know in DELAY FIXED( {in} , {dtime} , {init} ) we can't start delay from a particular day but how can i use a function like this that has a start time for delay ? i want that delay starts from time T . for instance {in} = 1 , {dtime} = 3 , {init} = 4 but delay starts from day 2 . for ...