Carl Baier

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Recent activity by Carl Baier Recent activity Votes

  • Column generation: Proper Aggregating of identical machines

    I have the following follow-up question to [this post][1]. One of the answers here confirmed that I can aggregate identical machines \(j\in J\) into a single machine profile. In my specific model, ...

    Carl Baier 1 follower 0 comments 1 vote

  • Column Generation Problems

    I have the following problem. I have a patient scheduling problem that I am solving with column generation due to its complexity. The model basically looks like this. The overall goal is to minimiz...

    Carl Baier Edited 2 followers 0 comments 0 votes

  • Problems adding columns "Only linear constraints allowed"

    Answered

    Hello, this is a follow-up post to this one. I updated my code quite a bit but there are still some problems remaining.  This is my code: from gurobipy import *import gurobipy as guimport pandas ...

    Carl Baier Edited 5 followers 88 comments 1 vote

  • Rostering problem with column generation

    Answered

    Hello, I would like to solve the following scheduling model with column generation.The indices are \(i\in I: Nurse\), \(s \in S: Shifts\) and \(t \in T: Days\). The decision variables are: \(x_{it...

    Carl Baier Edited 3 followers 14 comments 0 votes