Hello!
I have a production planning model with a rolling horizon setting. So the whole planning period is 52 weeks, but planning horizon is 8 weeks. We implement the first 4 weeks and then plan for another 8 weeks, so basically the last 4 weeks of the planning horizon 8 weeks are subject to change when the model is iterated but the first 4 weeks have to be fixed.
Basically like this:
I found some topic related to this here: https://newforum.gams.com/t/rolling-horizon-implementation/1120/1
It seems promising to implement what I want, but in addition to that, how can I fixed certain values and only have part of the values updated in each iteration?
So in each rolling horizon, I would like to fix variables in the first 4 periods and the rest 4 periods can be updated.
Thank you so much in advance!
