Hello Everyone,
I am trying to implement a lot sizing and scheduling model to GAMS.I am not getting any syntax errors but the model is not functioning properly.The model is not producing a valid production schedule.I am not sure what is causing the problem.I suspect that the Eq4 which is the inventory balance constraint is not working properly.
Here is the model and the gams code I wrote.Thanks for all your replies in advance!
Best Regards,
Burak.
Lot Sizing Implementation
Re: Lot Sizing Implementation
Hi Burak
I had a quick look at your model and the pdf file. Why are you restraining some of your equations to j > 1. The model description doesn't have these constraints (I believe).
Cheers
Renger
I had a quick look at your model and the pdf file. Why are you restraining some of your equations to j > 1. The model description doesn't have these constraints (I believe).
Cheers
Renger
____________________________________
Enjoy modeling even more: Read my blog on modeling at The lazy economist
Enjoy modeling even more: Read my blog on modeling at The lazy economist
Re: Lot Sizing Implementation
Hi Renger,
The model assumes the jobs are j=1,2,....,J and j=0 is the neutral state.I defined j as J0*J6 so I am putting the constraint ord(j)>1 in the constraints that dont compute for j=0.
Cheers,
Burak.