Koen Timmermans

Hi! I have a task scheduling problem that I'm trying to solve using a MILP model. It closely resembles a VRPTW (Vehicle Routing Problem with Time Windows). The exact model formulation can be found ...

Hi, I am using a self-written heuristic to find an initial feasible solution that I can provide to Gurobi as a MIPStart. After that I use the NoRelHeur to improve the solution before solving it fur...

Hi, I'm using the No Relaxation heuristic to quickly find feasible solutions for my optimization problem, which works very well. I was wondering whether it is possible to change the NoRelHeurTime p...

Hi! I have a task scheduling problem that I'm trying to solve using a MILP model. It closely resembles a VRPTW (Vehicle Routing Problem with Time Windows). I use binary decision variable \(x_{ijk}\...

Hi, Using \(\texttt{gurobipy-pandas}\), I want to create the following constraint: \[ z_{k} \geq y_{ik} \quad \forall i \in A, k \in K \] I have created y like this (ik_values_y as a multi index): ...

Hi! I have a binary decision variable \(x_{ijk}\) and I want to implement the following flow conservation constraint: \[ \sum_{j \in A} x_{ijk} = \sum_{j \in A} x_{jik} \quad \forall i \in A, k \in...

Hi! I am trying to define a binary decision variable \(x_{ijk}\) using gurobipy-pandas. I am working with two Pandas DataFrames: 1.) task_list, and 2.) vehicle_data. \(x_{ijk}\) is equal to 1 if ve...