Hi!
Could anyone suggest me appropriate formula? What I am trying to do is, will buy 100 cows from market and grown them up till getting milk (say, 50 weeks). then do milking for another 50 weeks. in between this process I will buy another 50 cow which will give me milk after 50 weeks. then first batch stop giving milk. Will culled 20% of cow from first batch. They will again give milk after 50 weeks. how can I make this SD loop with this description. Seeking desperate help.
waiting for kind response from someone.
Suitable formula
Suitable formula
M Shamsuddoha
Curtin University, Australia
Curtin University, Australia
-
- Super Administrator
- Posts: 4626
- Joined: Wed Mar 05, 2003 3:10 am
Re: Suitable formula
Have a look at the model "AGECHAIN.MDL". If you are running Windows 7, it should be in
C:\Users\Public\Vensim\help\models\Sample\EXTRA\
or
http://www.vensim.com/documentation/Mod ... ECHAIN.MDL
This will be a good model to start with. Change the variable names so that they are "cattle" instead of "population". To work out the amount of milk you get, multiply the "cattle middle" by "milk per cow per week" and you should have what you need.
C:\Users\Public\Vensim\help\models\Sample\EXTRA\
or
http://www.vensim.com/documentation/Mod ... ECHAIN.MDL
This will be a good model to start with. Change the variable names so that they are "cattle" instead of "population". To work out the amount of milk you get, multiply the "cattle middle" by "milk per cow per week" and you should have what you need.
Advice to posters seeking help (it really helps us to help you)
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Units are important!
http://www.bbc.co.uk/news/magazine-27509559
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Units are important!
http://www.bbc.co.uk/news/magazine-27509559
Re: Suitable formula
Hello Admin
Thanks for your suggestion. I tried to build my model according to your suggestion. But I failed to authenticate whether I am going right way to not. If you have time, could you please see the attached model and do some comment relating to my modelling problem. Thanks
Thanks for your suggestion. I tried to build my model according to your suggestion. But I failed to authenticate whether I am going right way to not. If you have time, could you please see the attached model and do some comment relating to my modelling problem. Thanks
Administrator wrote:Have a look at the model "AGECHAIN.MDL". If you are running Windows 7, it should be in
C:\Users\Public\Vensim\help\models\Sample\EXTRA\
or
http://www.vensim.com/documentation/Mod ... ECHAIN.MDL
This will be a good model to start with. Change the variable names so that they are "cattle" instead of "population". To work out the amount of milk you get, multiply the "cattle middle" by "milk per cow per week" and you should have what you need.
- Attachments
-
- Dairy.MDL
- (7.25 KiB) Downloaded 391 times
M Shamsuddoha
Curtin University, Australia
Curtin University, Australia
Re: Suitable formula
Thanks for your suggestion. I tried to build my model according to your suggestion. But I failed to authenticate whether I am going right way to not. If you have time, could you please see the attached model and do some comment relating to my modelling problem. Any idea will be appreciated!
- Attachments
-
- Dairy.MDL
- (7.25 KiB) Downloaded 401 times
M Shamsuddoha
Curtin University, Australia
Curtin University, Australia