Search found 3 matches

by utkarsh
5 years ago
Forum: Modeling
Topic: Help needed with constraint formulation
Replies: 0
Views: 1699

Help needed with constraint formulation

What is the most efficient way to get a binary variable A(t), {t - is a time point} which is '1' when a process is running at time point t, otherwise 0. Given that Ts and Tf are the start and end time continuous variables for that process and Val(t) is a parameter which has the value of time at time...
by utkarsh
5 years ago
Forum: Modeling
Topic: Running MIP Models bigger than 250GBs
Replies: 3
Views: 3212

Re: Running MIP Models bigger than 250GBs

Hi Miachel, Thanks for the insight. We will definitely try running a bit smaller version of the model as you suggested. However, I do need a bit of information on calculating memory required with the help of no. of variables and constraints. Is there any defined formula or technique where we input t...
by utkarsh
5 years ago
Forum: Modeling
Topic: Running MIP Models bigger than 250GBs
Replies: 3
Views: 3212

Running MIP Models bigger than 250GBs

Hi Team, We are trying to solve an MIP model with GAMS/CPLEX. The model returns a solution when we run it with small sets (less no. of variables). But in reality those sets can be very large and can have upto 3000-4000 elements. When we ran the model with the larger set (real case scenario), model g...