2025 INFORMS Computing Society Conference
Hexaly is the Platinum sponsor of the 2025 INFORMS Computing Society Conference, March 14-16, 2025, in Toronto, Canada.
Come by the Hexaly booth to meet Fred Gardi, Founder & CEO of Hexaly, and discover the new release Hexaly 13.5, which delivers dramatic performance improvements for solving Routing, Scheduling, Packing, Clustering, Assignment, Location, and many other problems in Supply Chain and Workforce Optimization. This is also the opportunity to explore and discuss our many job offers. Below is the abstract of Fred’s talk at the 2025 INFORMS Computing Society Conference.
Hexaly, a new kind of global optimization solver
Hexaly is a new kind of global optimization solver. Hexaly APIs unify modeling concepts from mixed-linear programming, nonlinear programming, and constraint programming. Its modeling interface is nonlinear and set-oriented. It also supports user-coded functions, thus enabling black-box optimization and, more particularly, simulation optimization. Under the hood, Hexaly combines various exact and heuristic optimization methods: spatial branch-and-bound, simplex methods, interior-point methods, automatic Dantzig-Wolfe reformulation, column and row generation, propagation methods, local search, population-based methods, and surrogate modeling techniques for black-box optimization. We illustrate these new modeling concepts on the seminal Traveling Salesman Problem (TSP), thus offering natural and compact modeling of the problem and performance on par with Concorde, the renowned TSP solver.