Question about Model Calibration

Use this forum to post Vensim related questions.
Post Reply
Emma
Newbie
Posts: 1
Joined: Sat Jul 22, 2017 9:19 pm
Vensim version: DSS

Question about Model Calibration

Post by Emma »

Hi,
I try to calibrate parameters in my model and have successfully calibrated the variables using Optimization Setup based on one set of time-series data.
However, I need to use 51 sets of data and make the calibration more reasonable. Can I use the subscripts, Trial: (T1-T51), to import data and then calibrate parameters using Optimization Setup? Is there any other methods to perform calibration?
Thanks for your help.
Emma
tomfid
Administrator
Posts: 3806
Joined: Wed May 24, 2006 4:54 am

Re: Question about Model Calibration

Post by tomfid »

There are generally two strategies.
- You could create 51 datasets for your model and estimate each individually, or
- You can subscript the model and estimate everything at once. (I think this is what you are suggesting.)

I think the second approach is generally preferable, unless you have computation speed problems.

You can add the [trial] dimension to parameters, but it generally makes sense to pool them as much as possible, to increase the sample size on which each is based, and minimize the size of the search space.
Post Reply