Runtime of LP vs MILP - Operations Research Stack Exchange
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Solving a large scale MILP problem with cplex takes long time
Jul 5, 2025 · I am solving a large scale MILP problem with cplex, it takes too much time and cannot obtain the solution, does it means that cplex is not suitable for this large scale MILP problem? what …
mixed integer programming - Complexity of LP and MILP Problems ...
Nov 11, 2019 · My original problem is an MILP. I make it an LP by relaxing the integer variables. Can someone please comment on the complexity, solvability and optimality of MILP and LP problems, in …
MILP: is it NP-complete or NP-hard?
Nov 12, 2019 · The pieces of information I get online are sometimes confusing. Someone says MILP problems are NP-hard, and somewhere else I found the claim that MILP problems are NP-complete. …
mixed integer programming - Guides for strong MILP Formulations ...
Jul 6, 2021 · Is the scientific community able to provide a guide for addressing the strength of a MILP formulation? Something like "disciplined convex programming" but for strong MILPs, lets call it …
What is the best open-source solver for large-scale MILP optimization?
Jul 7, 2024 · Currentlly, I am using ortools with SCIP/CBC solvers for a large scale optimization problem, which turned out to be quite slow. The integer part of my problem is due to a piece-wise linear …
How can I identify the reason that makes a MILP model hard for solvers ...
Sep 25, 2020 · For a MIP, out of memory exceptions typically happen when the tree size becomes very large. If your LP relaxation is weak, then intuitively your model may become easier if you can figure …
Settings for a faster solution of a MILP (GUROBI, python)
May 6, 2020 · 13 Using GUROBI with python. When solving a MILP, I notice that the incumbent is very early (25sec) at the optimal point but the best bound is so slow to fall (maximization problem) that it …
mixed integer programming - Conditional constraints in MILPs ...
Jun 29, 2023 · I want to understand how to represent iff constraints in MILPs. For example, I want to represent the following as the constraints of a MILP $$ c = \begin {cases} 1 &\text {if } d \geq e \\ 0 & \
CPLEX gives different solutions of MILP every run
Jan 12, 2022 · 5 I am solving a mixed-integer (binary) linear problem using CPLEX as a solver (branch-and-bound method). But I encountered the following issue. Each run I get a different solution at a …