The Barrier license option is required to utilize the Barrier solver. Depending upon the size and structure of a particular model, the Barrier solver may be significantly faster than the Simplex solvers and can provide exceptional speed on large 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 option utilizes a barrier or interior point method to solve linear models. The optional Barrier solver provides an alternative means of solving linear models. The solver dynamically chooses the best pricing option based upon problem characteristics. Pricing options, for instance, include partial pricing and Devex. The base version includes the Primal and Dual Simplex solvers, which incorporate numerous enhancements for maximum speed and robustness. LINGO is available with three state of the art solvers for linear models. This direct link also minimizes compatibility problems between the modeling language component and the solver components. This seamless integration allows LINGO to pass the problem to the appropriate solver directly in memory rather than through more sluggish intermediate files.

Unlike many modeling packages, all of the LINGO solvers are directly linked to the modeling environment. LINGO includes a set of built-in solvers to tackle a wide variety of problems.

Primal to dual converter