# Kyoto2.org

Tricks and tips for everyone

# Is cplex better than GuRoBi?

## Is cplex better than GuRoBi?

The results reveal that CPLEX and GuRoBi provide competitive optimization solutions. However, CPLEX performs better than GuRoBi under high dimensionality problems. Besides this, CPLEX is able to solve Non-convex mixed integer quadratic problem.

What algorithm does OptaPlanner use?

Under the hood, OptaPlanner combines sophisticated Artificial Intelligence optimization algorithms (such as Tabu Search, Simulated Annealing, Late Acceptance and other metaheuristics) with very efficient score calculation and other state-of-the-art constraint solving techniques for NP-complete or NP-hard problems.

How do you use constraints in Excel Solver?

In the Solver Parameters dialog box, under Subject to the Constraints, click Add. In the Cell Reference box, enter the cell reference or name of the cell range whose value(s) you want to constrain. You can use a single cell or a cell range, but not multiple ranges.

### Is cplex faster than gurobi?

CPLEX is a bit faster than GUROBI in terms of proving the optimal solution.

What is Choco solver?

Choco Solver is an Open Source Java library for Constraint Programming that has been used for more than 20 years by many companies and universities. Choco is among the most efficient solvers available and has a high code quality.

How do constraint solvers work?

Constraint propagation works by reducing domains of variables, strengthening constraints, or creating new ones. This leads to a reduction of the search space, making the problem easier to solve by some algorithms.

## Is ILP convex?

Since the ILP solution space is not a convex set, we cannot use convex optimization techniques.

Can Solver have multiple objectives?

In fact, doing so you could add as many objectives as you want and they would be solve with a lexicographic order (higher priority given to the previous objective).