Respected Everyone, please check the belowattached code.
This is a multiobjective scheduling technique.
While optimizing the objectives separately, they are working fine, but when I tried to use Pareto optimal, I got constant optimized values instead of getting mutually varying values.
Please provide the error in case anyone finds it in the below attached and posted.
Thank you in advance.
Problem while modelling Pareto Optimal Solution
Re: Problem while modelling Pareto Optimal Solution
Have you ever looked at the ranges parameter? I get:
Not much wiggle room. When I try to explicitly min/max the two objectives via:
I get
So not much room to get differences for OF2 and hence to point in doing multiobjective optimization. It's enough to min OF1.
Michael
PS I used global MINLP solver BARON.
Code: Select all
 243 PARAMETER ranges
OF1min 625.394, OF2max 35.830, OF2min 35.830, OF1max 625.394
Code: Select all
solve problem using MINLP minimizing of1; ranges('OF1min') = of1.l;
solve problem using MINLP maximizing of1; ranges('OF1max') = of1.l;
solve problem using MINLP minimizing of2; ranges('OF2min') = of2.l;
solve problem using MINLP maximizing of2; ranges('OF2max') = of2.l;
Code: Select all
 250 PARAMETER ranges
OF1min 625.394, OF1max 985.626, OF2min 35.830, OF2max 35.830
Michael
PS I used global MINLP solver BARON.
Re: Problem while modelling Pareto Optimal Solution
Respected sir,
Thank you for your answer.
As you have mentioned that there is no room for doing two objectives, I tried to make it into a single objective as coded in the belowattached files. but I am getting the error while doing so.
Sir, can you please resolve the issue and provide me with the path to get it for the belowattached codes (in between both the below codes I changed the formula of the previous code file's second objective ).
Thanks in advance.
Thank you for your answer.
As you have mentioned that there is no room for doing two objectives, I tried to make it into a single objective as coded in the belowattached files. but I am getting the error while doing so.
Sir, can you please resolve the issue and provide me with the path to get it for the belowattached codes (in between both the below codes I changed the formula of the previous code file's second objective ).
Thanks in advance.
 Attachments

 Untitled_11.gms
 CODE11
 (17.2 KiB) Downloaded 22 times
Re: Problem while modelling Pareto Optimal Solution
Sorry, no idea what you are asking for. I download both models. They both compile and solve fine. What do you think is the matter with them?
Michael
Michael
Re: Problem while modelling Pareto Optimal Solution
respected sir,
while I was trying to optimize, it was showing.
DICOPT: Terminating
DICOPT: stopped on NLP worsening.
Thank you in advance.
while I was trying to optimize, it was showing.
DICOPT: Terminating
DICOPT: stopped on NLP worsening.
Thank you in advance.
Re: Problem while modelling Pareto Optimal Solution
Respected sir,
For the aboveattached codes (Untitled 11 and 12), when I was trying to optimize, it was showing the following errors.
DICOPT: Terminating
DICOPT: stopped on NLP worsening
Thank you in advance. Please provide the solution.
For the aboveattached codes (Untitled 11 and 12), when I was trying to optimize, it was showing the following errors.
DICOPT: Terminating
DICOPT: stopped on NLP worsening
Thank you in advance. Please provide the solution.