Hello Dear
I want to model one dairy supply chain along with waste management through vensim.
can someone help?
Regards
Dr Doha
Search found 75 matches
- Mon Mar 15, 2021 3:39 pm
- Forum: Vensim
- Topic: Dairy supply chain help
- Replies: 1
- Views: 1819
- Sun Aug 04, 2013 12:12 am
- Forum: Vensim
- Topic: Appropriate formula
- Replies: 1
- Views: 2879
Appropriate formula
Dear Experts! I am little confused about the issue of using real data to drive model and model behaviour drives the model. I have discussed few experts. Some of them told me that I can use real data to drive the model but others denied to agree on it. They preferred to generate model behaviour from ...
- Sun Jul 07, 2013 10:27 am
- Forum: Vensim
- Topic: Condition of forming rate and level variable
- Replies: 4
- Views: 4718
Re: Condition of forming rate and level variable
Hi JJ Thanks for your reply. Regarding you comment " But if there are many different flows for the same level, it maybe better to put together the inflow and the outflow into one single flow", I would like to know little more. Say, A parent chicken is giving 4 eggs in a week. Parent Chicke...
- Sun Jul 07, 2013 10:16 am
- Forum: Vensim
- Topic: unit conversion
- Replies: 23
- Views: 26015
Re: unit conversion
Dear Sir I have tried same way as you have written but did not work. I think, I found the reason but cannot solve it. Say, Egg is a level, input of eggs level is eggs/week, and output as Chicks/week because immediate level variable is Chicks. Then the same happen immediately output is chicken/week. ...
- Sun Jul 07, 2013 12:58 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Hi LAUJJL Thanks for your mail. In fact I do not need your model with equation. I need simple model. I have read through the chapter and article. I tried to build RC in my model, but I do not trace them whether they are working alright or not. Please see the below model which I get from Vensim guide...
- Sat Jul 06, 2013 1:40 am
- Forum: Vensim
- Topic: Condition of forming rate and level variable
- Replies: 4
- Views: 4718
Condition of forming rate and level variable
Hi Dear Hello! I have a few basic questions relating to rate and level variable. One of expert comment that rate can not determine another rate. Is it true? Then what is the precondition or how many ways we can form rate variable towards level variable? for level variable, should it be necessary to ...
- Sat Jul 06, 2013 1:02 am
- Forum: Vensim
- Topic: unit conversion
- Replies: 23
- Views: 26015
Re: unit conversion
Hi! I tried to do unit conversion in consecutive three level variable but failing to replicate this. I want to convert from Eggs to Chicks to Chicken to Money. All these changes will come one after. Could anybody help me to do so? Say, Eggs in- Eggs (level)- Chicks out - Chicks (Level) - Chicken out...
- Sat Jul 06, 2013 12:50 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Hi LAUJJL How you doing? Your file is massive for me to follow as I am a new in modelling. Could you please set one or two RC command within s simple model? It may help me to learn more clearly. Sorry for giving you little trouble. Doha Hi Msdoha About your question on validity and reliability one m...
- Sun Apr 21, 2013 11:13 pm
- Forum: Vensim
- Topic: Discrete or Continuous Simulation
- Replies: 1
- Views: 2835
Discrete or Continuous Simulation
Hi! I am little confused on basics of using which type of simulation in my model. Say, if it is process supply chain model, which one will be best to use whether discrete or continuous? Is vensim good for Discrete? It may be basic question but I am struggling to come a final decision. Please help! t...
- Sat Apr 13, 2013 12:03 pm
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Thanks JJ. I will get back to you once I will have some questions to ask you. By the way, do you have english version of the attached model?
- Thu Apr 04, 2013 12:31 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Yes, you are right. Somehow it was set to R2auto. What is the difference between them? Can you send me back your trial on sensitivity over my file? thanks again. I think it's important, but the quality of the model is of greater importance. I can make sensitivity runs with your model without any pro...
- Wed Apr 03, 2013 12:19 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Hi Tom
My version is 6.0b. Can you confirm me one thing that is it must to do sensitivity for a research?
My version is 6.0b. Can you confirm me one thing that is it must to do sensitivity for a research?
tomfid wrote:I still can't replicate any problems - this works fine for me. What Vensim version and operating system are you running?
- Tue Apr 02, 2013 4:01 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Please see the attachment.
tomfid wrote:Hmm ... this runs fine for me. Can you post one more file - the savelist (.lst)? Thanks.
- Mon Apr 01, 2013 11:07 pm
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Hi!
Please see the attachment for excel file.
Please see the attachment for excel file.
tomfid wrote:Also, we'll need any input data that the model requires to run - either a .vdf or .xls, per usage.
- Mon Apr 01, 2013 2:15 pm
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Hi Dear I have given short form of the model named exp. Could you please check the attachment of my previous message? Thanks Doha I think we can't debug the DCC43327 error without a copy of the model and sensitivity files - you can email them to us, vensim at vensim.com if you can't post them public...
- Mon Apr 01, 2013 9:02 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Hi Tom Thanks for your reply. My waring setting is set as suppress. I have added the partial model and another error message as an attachment. If I want to do 'Monte Carlo', it just crash. Please help. If you have time, can you see the Monte carlo setting and analysis what I wanted to do. Thanks The...
- Mon Apr 01, 2013 3:34 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Sensitivity Analysis
Thanks for your reply. The initial time is 0. How can I post you crash screen shot? as it shows two option of "Close Vensin" and "Debug". If I click debug it is asking for Visio key. Can you please explain step by step regarding "before first time..."? What steps can I ...
- Mon Apr 01, 2013 12:06 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Sensitivity Analysis
Hi Dear I am trying to do sensitivity analysis of my model but it is giving me error and did not go through as it giving below message: ERROR: Unable to achieve desired accuracy in integration at time 90.8125. ERROR: Unable to achieve desired accuracy in integration at time 98.875. ERROR: Unable to ...
- Sun Dec 09, 2012 10:36 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Hi!
I can't find this file in the below link. It seems that it has been removed.
http://www.blog.metasd.com/wp-content/u ... itique.pdf
Thanks
I can't find this file in the below link. It seems that it has been removed.
http://www.blog.metasd.com/wp-content/u ... itique.pdf
Thanks
- Tue Dec 04, 2012 11:43 pm
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Re: Reliability and validity along with reality check option
Dear Admin Thanks for your reply. In my first question, you have told me that it is a good sign that data matches with real data which means model is working correctly. At the same time, you have answered in my third question that model should dimensionally correct and show how closely it matches wi...
- Sat Dec 01, 2012 10:33 am
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 42528
Reliability and validity along with reality check option
Hi! Can anybody give me an easy example of checking validity and reliability in Vensim? If I do check/compare the model result manually with the real output, can it be sufficient for reliability check? If I check through "Model Check" and "Unit Check", is it sufficient to say my ...
- Sat Nov 24, 2012 10:33 am
- Forum: Vensim
- Topic: Delayed System time
- Replies: 14
- Views: 11853
Re: Delayed System time
Hi! I meant that it has already given 0 by default. What I tried is that I run the model and click each variable and see table values and found print every as 0. was it like that you meant? If no, could you please tell step by step so that I can understand as an apprentice. Is there any other explan...
- Fri Nov 23, 2012 3:41 pm
- Forum: Vensim
- Topic: Delayed System time
- Replies: 14
- Views: 11853
Re: Delayed System time
Hi!
It is Zero, after that the problem remain same.
thanks
It is Zero, after that the problem remain same.
thanks
Administrator wrote:If you right click on the table tool, there is a setting for "print every". Set this to be zero." set print to 0"?
- Fri Nov 23, 2012 3:33 pm
- Forum: Vensim
- Topic: Delayed System time
- Replies: 14
- Views: 11853
Re: Delayed System time
There are so many things to learn. Thanks again to open up another learning for me. Could you please explain what is" set print to 0"?? You should start by tracing your variables, by using the table tool on the left side of the sketch. right click on it and set the selected variables to ca...
- Fri Nov 23, 2012 1:10 am
- Forum: Vensim
- Topic: Delayed System time
- Replies: 14
- Views: 11853
Re: Delayed System time
Hi JJ Thanks for your reply. I am a apprentice in modelling and Vensim. Hope all of you will help at least minimum. As you have written that all of my level are 0, even I put any value in initial then it might go one step and again it will shows 2/3 time step zero which is not looks realistic. Could...