ARCHIVES - Solve Problems Faster with What'sBest! 5.0 and LINGO 6.0
Solve Problems Faster with What'sBest! 5.0 and LINGO 6.0
What'sBest! 5.0 and LINGO 6.0 contain an enhanced set of solvers that are substantially faster on broad classes of problems. These releases also contain an improved integer solver as well as a number of other enhancements.
Over Nine Times Faster on Large Models
What'sBest! and LINGO are available with three different state-of-the-art solvers for linear models. The user can select the solver best suited for a particular problem. The best average times for the three solvers in What'sBest! 5.0 are compared with What'sBest! 4.0 and What'sBest! 3.1 linear solvers in the table below (speed improvements for LINGO are similar):
New Barrier Solver
One of the most significant enhancements in What'sBest! 5.0 and LINGO 6.0 is the addition of a Barrier solver. The Barrier solver, also known as an interior point solver, can provide exceptional speed on larger linear models -- particularly on sparse models with more than 5,000 constraints or highly degenerate models. Unlike the Simplex solvers that move along the exterior of the feasible region, the Barrier solver moves through the interior space to find the optimum. The Barrier solver is sold as a separate option to the base versions of What'sBest! and LINGO that includes the Primal and Dual Simplex solvers.
Faster Simplex Solvers
The speed and robustness of the Primal and Dual Simplex solvers have also been improved. The Dual Simplex solver can be invoked as an option on a linear model. The best average times for the What'sBest! 5.0 Simplex solvers are compared with What'sBest! 4.0 and What'sBest! 3.1 Simplex solvers in the table below:
Improved Integer Solver
What'sBest! and LINGO include a probing option for integer programming models that examines the integer variables and deduces tighter variable bounds and right-hand side values. Also, users have the ability to specify different branching and cut generation strategies. Experimenting with these integer options can often dramatically increase solver speed on certain classes of models.
Increased Technical Control
Several user options have been added for tailoring the solution process on linear and nonlinear models. These include specifying pricing strategies, turning on or off model scaling, and adjusting a variety of internal solver tolerances.
For more information on the latest releases of LINGO and What'sBest!, please see the product page. You can also download a demo version from our download page or order a full blown version directly from our order page.