Senior Optimization Scientist
About Frédéric
Articles written by Frédéric
New release: LocalSolver 11.5 November 7, 2022
We are pleased to announce the release of LocalSolver 11.5. Discover below the main novelties coming with this new release. Vehicle Routing problems Vehicle Routing problems are solved even faster. The “gap” mentioned below is the relative gap in % between the solutions computed by LocalSolver 11.5 within 1 minute of running time on a standard…
Modeling and Solving Non-Convex Quadratic Problems July 11, 2022
A recent post on Erwin Kalvelagen’s blog, Yet Another Math Programming Consultant, shows results obtained by state-of-the-art solvers on some non-convex quadratic problems. LocalSolver can compute lower bounds and prove optimality using global, exact optimization techniques. This article presents the results of LocalSolver Optimizer with default parameter setting on the non-convex quadratic models presented in Erwin…
Hexaly vs Gurobi on a Maintenance Scheduling Problem May 2, 2022
The ROADEF Challenge is an Operations Research challenge organized by the French Operations Research Society and an industrial partner every two years. The topic of the ROADEF 2020 Challenge was a Maintenance Scheduling Problem arising in the electricity industry. It was posed by RTE, the French transmission system operator. This company is responsible for the…
New release: LocalSolver 11.0 March 21, 2022
We are pleased to announce the release of LocalSolver 11.0, which comes with many new features and performance improvements. Discover the main novelties coming with this new release. Vehicle Routing problems Vehicle Routing problems have never been solved faster: Production Scheduling problems Sequencing and Scheduling problems up to 10,000 tasks optimized in minutes: Simulation Optimization problems…
LocalSolver Cloud August 9, 2021
With the release of LocalSolver 10.5, we are glad to announce the release of a new service, LocalSolver Cloud. It is now easier than ever to leverage the power of cloud computing and get the best results for your optimization problem in the shortest amount of time. This new feature requires no configuration and is provided…
Modeling and Solving Curve Fitting Problems June 7, 2021
LocalSolver solves combinatorial but also continuous optimization problems. Here we show how Curve Fitting problems can be easily modeled and optimally solved, in seconds, using LocalSolver Optimizer. Curve Fitting consists in constructing a curve that best fits a series of data points. A pair of input and output define each data point. The curve corresponds to…
Two New Big Features for LSP Lovers May 10, 2021
With the release of LocalSolver 10.0, one of the key features we wanted to push forward was integrating LSP programs into full production-ready applications. The JSON module and the Modeler API were both introduced to facilitate data processing in and out of an LSP program. In this article, we present these features with small examples. We recommend looking at the language…
Modeling and Solving the Aircraft Landing Problem January 18, 2021
LocalSolver is the solver of choice to tackle large-scale scheduling problems. As an example, we show here how the Aircraft Landing Problem can be easily modeled and efficiently solved using LocalSolver Optimizer. This problem is described in the article “Scheduling aircraft landings – the static case” by J. E. Beasley, M. Krishnamoorthy, Y. M. Sharaiha, and…